To efficiently download Xcode on your Mac, here’s a quick, step-by-step guide: The most straightforward method is via the Mac App Store. Simply open the App Store application on your Mac, search for “Xcode,” and click the “Get” or “Download” button. This will initiate the download and installation process automatically. For larger files like Xcode which can be over 12GB, ensure you have a stable internet connection and sufficient disk space. Alternatively, for specific versions or if you encounter issues with the App Store, you can download Xcode directly from the Apple Developer website at https://developer.apple.com/download/. This method often requires an Apple Developer account, which is free to create. Once downloaded, you’ll receive a .xip file that needs to be extracted and dragged into your Applications folder.

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Table of Contents

Getting Started with Xcode: Your Essential Developer Toolkit

Xcode is Apple’s integrated development environment IDE for macOS, used to develop software for macOS, iOS, iPadOS, watchOS, and tvOS.

It’s the cornerstone for any developer looking to build applications for Apple’s ecosystem.

Think of it as your workshop, where you’ll craft, debug, and fine-tune your digital creations.

Understanding how to acquire and set up Xcode is the first crucial step in your journey as an Apple platform developer.

Why Xcode is Indispensable for Apple Development

Xcode isn’t just an IDE.

It’s a comprehensive suite of tools that includes a code editor, a powerful debugger, a graphical user interface GUI builder Interface Builder, asset management, and a simulator to test your apps on various devices without needing the physical hardware.

It supports multiple programming languages, most notably Swift and Objective-C.

Its tight integration with the Apple ecosystem allows developers to leverage features like iCloud, Face ID, and Apple Pay seamlessly.

According to Statista, Swift was among the top 15 most popular programming languages worldwide in 2023, largely due to its association with iOS and macOS development, which relies heavily on Xcode.

System Requirements for Xcode

Before you even think about hitting that download button, make sure your Mac is up to the task. Xcode is a hefty application, and it demands significant resources. As of late 2023, Xcode 15.x typically requires macOS Ventura 13.5 or later. Earlier versions of Xcode support older macOS versions, but staying current is always recommended for access to the latest APIs and features. You’ll need substantial free disk space—we’re talking upwards of 40-50 GB for the installation and subsequent project files. Memory-wise, 8GB RAM is a minimum, but 16GB or more is highly recommended for a smooth development experience, especially when dealing with larger projects or multiple simulators running simultaneously. A modern Intel or Apple Silicon processor is also essential for optimal performance. Trying to run Xcode on an underpowered machine can lead to a frustrating experience, with slow build times and unresponsive interfaces. How to use css rgba

The Mac App Store: Your First Stop for Xcode

The Mac App Store is, for most users, the simplest and most recommended way to download and install Xcode.

It handles the entire process, from downloading the large file to placing it correctly in your Applications folder and even managing updates.

This method is akin to a streamlined, almost effortless experience, requiring minimal technical intervention.

How to Download Xcode from the App Store

Open the App Store: You can find the App Store icon in your Dock, Launchpad, or by searching for it using Spotlight Command + Space and type “App Store”.
Search for Xcode: Once the App Store is open, use the search bar in the top-right corner and type “Xcode.”
Initiate Download: Click on the “Get” button next to the Xcode listing. If you’ve downloaded it before, it might show a cloud icon with a downward arrow.
Authenticate: You may be prompted to enter your Apple ID password or use Touch ID/Face ID to confirm the download.
Monitor Progress: The download will begin. Given Xcode’s large size often over 12GB, this could take a significant amount of time depending on your internet speed. You can monitor the progress directly in the App Store or via the Xcode icon in your Applications folder/Launchpad.
Automatic Installation: Once the download completes, Xcode will automatically install itself into your Applications folder. You don’t need to do anything further.
First Launch Setup: The first time you launch Xcode, it might ask you to install additional components, which are necessary for full functionality. Click “Install” and provide your administrator password if prompted. This step is crucial for things like command-line tools.

Troubleshooting App Store Downloads

Sometimes, things don’t go as smoothly as planned.

If you encounter issues while downloading Xcode from the App Store:

Insufficient Disk Space: This is a common culprit. Go to About This Mac > Storage to check your available space. You might need to free up tens of gigabytes. Consider external drives for large files or deleting old, unnecessary applications.
Internet Connectivity Issues: A fluctuating or slow internet connection can cause downloads to fail or stall. Ensure you have a stable Wi-Fi connection or try a wired Ethernet connection if possible. Pausing and resuming the download might also help.
App Store Cache Problems: Sometimes clearing the App Store cache can resolve issues. While there isn’t a direct “clear cache” button, signing out of the App Store, restarting your Mac, and signing back in can often refresh things.
macOS Version Incompatibility: Ensure your macOS version meets the minimum requirements for the Xcode version available on the App Store. If your macOS is too old, the App Store won’t show the latest Xcode, or it might prevent installation.
Server Issues: Rarely, Apple’s servers might be experiencing high load or temporary issues. In such cases, waiting a few hours and trying again is often the best solution. You can check Apple’s System Status page to see if there are any reported outages.

Apple Developer Website: For Specific Xcode Versions

While the App Store is convenient, the Apple Developer website offers greater flexibility, particularly if you need to download a specific older version of Xcode or want early access to beta releases.

This method is often preferred by seasoned developers who manage multiple projects targeting different macOS/iOS versions.

Steps to Download Xcode from Developer.apple.com

Visit the Downloads Page: Open your web browser and navigate to https://developer.apple.com/download/.
Sign In: You’ll need to sign in with your Apple ID. If you don’t have an Apple Developer account, you can create one for free. While some downloads might require a paid developer program membership, Xcode releases and betas are generally accessible with a free account.
Locate Xcode: On the Downloads page, you’ll see a list of available software downloads. Use the search bar or scroll down to find “Xcode.” You’ll typically find both the latest stable release and beta versions here.
Download the .xip File: Click on the desired Xcode version. This will initiate the download of a large .xip Xcode Installer Package file. This file can be very large, often exceeding 12GB.
Extraction: Once the .xip file has finished downloading it will usually be in your Downloads folder, double-click it to begin the extraction process. This can take a considerable amount of time and disk space, as it decompresses into the full Xcode application. Ensure you have enough free space – often double the .xip file size is a safe bet during extraction.
Move to Applications Folder: After extraction, you’ll find an Xcode.app file. Drag and drop this file into your Applications folder. This is standard practice for macOS applications.
First Launch Setup: Similar to the App Store version, the first time you launch Xcode from your Applications folder, it will prompt you to install additional components. Allow this process to complete.

Advantages of Using the Developer Website

Access to Older Versions: Crucial for maintaining compatibility with older projects or if your macOS version can’t support the latest Xcode.
Beta Releases: Get a head start on new features and APIs by downloading beta versions before they are publicly released. This allows you to test your apps against upcoming OS versions.
Command Line Tools CLT for Xcode: While often bundled or prompted on first launch, the developer site also provides separate downloads for Command Line Tools, which are essential for many development workflows even without the full Xcode IDE.
Offline Installation: Once you have the .xip file, you can move it to another Mac and install Xcode without needing an internet connection after the initial download.

Command Line Tools for Xcode

Even if you don’t plan on developing graphical applications or using Xcode’s full IDE, the Command Line Tools CLT for Xcode are often indispensable for developers working on macOS.

They provide essential UNIX tools, compilers like clang, and header files required for building software from the command line, often used by scripting languages, package managers like Homebrew, and various open-source projects.

Installing Command Line Tools

There are two primary ways to install the Command Line Tools: Ios unit testing tutorial

Through Xcode: When you install the full Xcode IDE and launch it for the first time, it typically prompts you to install these additional components. Accepting this prompt is the easiest way.
Via Terminal: You can install them directly using the command line. Open Terminal found in Applications/Utilities and type:
```
xcode-select --install
```
This command will open a software update dialog box, prompting you to install the tools.

Click “Install” and follow the on-screen instructions.

This is particularly useful if you only need the CLTs and don’t want to install the entire Xcode IDE, which can save a significant amount of disk space.
3. From Apple Developer Website: As mentioned, you can also download the Command Line Tools as a separate .dmg file from the Apple Developer Downloads page. Search for “Command Line Tools for Xcode” and select the version corresponding to your macOS. This is often the most reliable method if the xcode-select --install command fails for some reason.

Verifying Installation

After installation, you can verify that the Command Line Tools are correctly installed by opening Terminal and typing:

xcode-select -p

This command should return the path to the installed developer directory, typically /Applications/Xcode.app/Contents/Developer if you have the full Xcode, or /Library/Developer/CommandLineTools if you only installed the CLTs.

You can also test with a simple command like gcc --version or make --version to see if the compilers are recognized.

Managing Multiple Xcode Versions

For many professional developers, especially those working on diverse projects or supporting older app versions, having multiple Xcode installations is a common necessity.

For example, you might need an older Xcode to maintain an app targeting an older iOS version, while using the latest beta to prepare for an upcoming OS release. Jest vs mocha vs jasmine

Strategies for Multiple Installations

Renaming Xcode.app: The simplest way to manage multiple versions downloaded from the Apple Developer website is to rename the Xcode.app bundle before moving it to your Applications folder. For example, you could have Xcode_14.3.app and Xcode_15.0.app. This allows them to coexist in the Applications folder.
xcode-select Command: When you have multiple Xcode versions, you need to tell your system which one should be used for command-line tools and builds. You can do this using the xcode-select command in Terminal.
To list currently selected Xcode:
xcode-select -p
To set a specific Xcode version as active:

Sudo xcode-select -s /Applications/Xcode_15.0.app/Contents/Developer

Replace /Applications/Xcode_15.0.app/Contents/Developer with the actual path to the Xcode version you want to set as default.

You’ll need administrator privileges sudo for this.
3. Hard Links/Symlinks Advanced: Some developers create symbolic links to manage specific Xcode versions, but for most, renaming and using xcode-select is sufficient and less prone to errors.

Best Practices for Multiple Xcodes

Clear Naming Conventions: Rename your Xcode applications clearly e.g., Xcode 14.3.app, Xcode 15 Beta.app so you can easily identify them.
Dedicated Folders Optional: Instead of directly in Applications, some developers create a Developer folder within Applications to keep all Xcode versions organized.
Disk Space Management: Be acutely aware of your disk space. Each full Xcode installation can consume 40-50GB. If you’re running low, consider archiving older, less-used versions to an external drive.
Updating Specific Versions: When updating, be careful. If you download from the App Store, it will always overwrite your main Xcode.app. If you have renamed versions, you’ll need to download the new version from the developer portal and rename it accordingly.

Post-Installation Configuration and Setup

Once Xcode is installed, there are a few important post-installation steps and configurations to ensure you have a smooth development experience.

This includes installing additional components, setting up simulators, and possibly customizing your Xcode environment.

Installing Additional Components and Simulators

When you first launch Xcode, it typically prompts you to install “Additional Required Components.” This is vital.

These components include essential tools like debuggers, compilers, and frameworks that Xcode needs to function properly.

Simulators: Xcode comes with simulators for various iOS, iPadOS, watchOS, and tvOS devices. To add more specific device models or OS versions e.g., an older iOS simulator for testing compatibility, go to Xcode > Settings or Preferences on older Xcode > Platforms. Here you can download additional simulator runtimes for different OS versions. This is crucial for comprehensive testing across device types and OS versions.
Command Line Tools: As discussed, ensure these are installed, either directly by Xcode or via xcode-select --install.

Basic Xcode Preferences and Customization

Xcode is highly customizable. How to test redirect with cypress

Taking a few minutes to set up your preferences can significantly boost your productivity.

Text Editing: Go to Xcode > Settings > Text Editing. Here you can adjust fonts, colors choose a theme like Default Dark or Xcode Light, indentation, and code completion settings. Many developers prefer a dark theme for reduced eye strain.
Key Bindings: Under Key Bindings, you can customize keyboard shortcuts. If you’re migrating from another IDE, you might want to adjust these to match your muscle memory.
Accounts: Navigate to Xcode > Settings > Accounts. Add your Apple ID here. This is essential for signing your applications, accessing developer program resources, and submitting apps to the App Store. If you are part of a team, your team agent can add you to their developer account.
Source Control: Xcode has built-in Git integration. If you use Git, ensure your Git user name and email are configured under Source Control > Git.

Keeping Xcode Updated

Regularly updating Xcode is crucial for several reasons:

Latest SDKs and APIs: New OS versions bring new features and APIs. Xcode updates provide the necessary SDKs to utilize these.
Bug Fixes and Performance Improvements: Apple constantly refines Xcode, fixing bugs, and improving build times and overall performance.
Security Patches: Updates often include security enhancements, protecting your development environment.
Compatibility: To submit apps to the App Store, you typically need to use the latest stable version of Xcode, or at least a version that supports the target OS version.

You’ll be notified of updates via the Mac App Store if you downloaded Xcode from there.

If you downloaded from the developer website, you’ll need to manually check the site for new releases and download the new .xip file.

Alternatives and Other Development Tools

While Xcode is the primary tool for native Apple development, the ecosystem offers various alternatives and complementary tools.

Understanding these can broaden your development horizons or provide solutions for specific needs.

Cross-Platform Development Frameworks

If your goal is to build applications for multiple platforms iOS, Android, Web from a single codebase, cross-platform frameworks are excellent alternatives to purely native Xcode development.

React Native: Developed by Facebook, React Native allows you to build mobile apps using JavaScript and React. It compiles to native UI components, offering a near-native look and feel. Companies like Instagram, Facebook, and Walmart use React Native.
Flutter: Google’s UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase. Flutter uses Dart as its programming language and is known for its fast development cycles and expressive UI. Alibaba, Google Ads, and BMW use Flutter.
Xamarin: A Microsoft-owned framework for building cross-platform apps with C# and .NET. It allows for code sharing across iOS, Android, and Windows while still providing access to native APIs.
Ionic: An open-source framework for building hybrid mobile apps using web technologies HTML, CSS, JavaScript and Angular, React, or Vue. Ionic apps run inside a WebView, which can sometimes lead to performance differences compared to native apps.

These frameworks don’t eliminate the need for Xcode entirely, as Xcode is still required to compile the iOS versions of these applications and to access the iOS simulator.

However, they significantly reduce the time spent in Xcode for actual code writing.

Other Development Environments and Tools

Visual Studio Code VS Code: While not an IDE like Xcode, VS Code is a highly popular and powerful code editor from Microsoft, used by millions of developers. It supports a vast array of programming languages and frameworks through extensions. It’s often used in conjunction with Xcode, especially for cross-platform development e.g., writing React Native or Flutter code in VS Code, then using Xcode for building and deploying the iOS app.
AppCode: A commercial IDE from JetBrains creators of IntelliJ IDEA specifically designed for iOS/macOS development. It offers advanced code analysis, refactoring, and navigation features often praised by developers. However, it’s not a replacement for Xcode as it still uses Xcode’s build system and compilers.
Git Clients: Tools like SourceTree, GitHub Desktop, or GitKraken provide graphical interfaces for Git version control, making it easier to manage repositories, commits, and branches outside of Xcode’s built-in source control.
Design Tools: For UI/UX designers, tools like Sketch, Figma, or Adobe XD are essential for creating app designs and prototypes before development begins.

Choosing the right tools depends on your project’s scope, your team’s expertise, and your target audience. Regression test plan

For pure native Apple development, Xcode remains king.

For broader reach, cross-platform frameworks offer a compelling path.

Common Issues and Troubleshooting When Downloading Xcode

Even with straightforward instructions, downloading and setting up a large application like Xcode can sometimes hit snags.

Knowing the common issues and how to resolve them can save you significant time and frustration.

“Xcode is too large for your disk” or “Not enough disk space”

This is arguably the most frequent problem.

Xcode’s full installation can take up 40-50 GB, plus additional space for simulators, project files, and cache.

Solution 1: Free up space.
- Empty Trash: Start with the simplest.
- Delete large, unused files: Videos, old downloads, large archives.
- Uninstall unused applications: Drag them from Applications to Trash.
- Clear Downloads folder: Often a repository of large, temporary files.
- Manage Photos and iCloud Drive: If you store many photos locally, consider optimizing storage by offloading originals to iCloud and keeping optimized versions on your Mac.
- Developer-specific cleanup:
  - Derived Data: Xcode stores build products and intermediate files here. You can safely delete contents of ~/Library/Developer/Xcode/DerivedData/.
  - Old Simulators: In Xcode, go to Xcode > Settings > Platforms. You can delete older, unused simulator runtimes.
  - Old iOS Device Support: ~/Library/Developer/Xcode/iOS DeviceSupport/ can contain large files for each iOS device you’ve connected. Delete older versions.
Solution 2: Use an external drive temporary. If absolutely stuck, you can sometimes download the .xip file to an external drive, extract it there, and then move the Xcode.app to your Applications folder. However, Xcode runs best on your internal SSD.

Download Stuck or Very Slow

A common complaint, especially for large downloads.

Solution 1: Check Internet Connection.
- Perform a speed test e.g., speedtest.net. If your speed is significantly lower than expected, troubleshoot your Wi-Fi, router, or contact your ISP.
- Try a wired Ethernet connection if possible. it’s often more stable.
Solution 2: Pause and Resume. In the App Store, click on the Xcode icon which will show a progress bar to pause the download, then click again to resume. For .xip downloads, you might need to stop and restart your browser download.
Solution 3: Restart Mac. A fresh start can sometimes clear network or App Store glitches.
Solution 4: Try a different network. If possible, try downloading from a different location with a better internet connection.
Solution 5: Use developer.apple.com instead of App Store. Sometimes one source performs better than the other.

“Xcode.app is damaged and can’t be opened.” or “App can’t be opened because it is from an unidentified developer.”

These issues often occur if the download was incomplete or corrupted, or if Gatekeeper is being overly cautious.

Solution 1: Re-download. The most reliable fix for a “damaged” application is to delete the current Xcode.app and the original .xip if applicable and re-download it.
Solution 2: Allow from “Security & Privacy.” If you get the “unidentified developer” message: Cypress vs puppeteer
1. Go to System Settings or System Preferences > Privacy & Security.
2. Scroll down to the “Security” section.
3. You might see a message like “Xcode.app was blocked from opening because it is not from an identified developer.” Click “Open Anyway.”
- Note: This is usually not an issue for Xcode downloaded from the App Store, only for .xip downloads.
Solution 3: Verify app integrity rare, for advanced users. For .xip downloads, you can sometimes verify the SHA256 checksum of the downloaded file against the one provided by Apple if available to ensure it wasn’t corrupted during download.

Xcode fails to install additional components

After launching Xcode for the first time, it might fail to install necessary components.

Solution 1: Check internet connection again. These components are downloaded separately.
Solution 2: Check disk space. Again, insufficient space can prevent these small downloads.
Solution 3: Administrator Privileges. Ensure your user account has administrator privileges. You might be prompted for your password. make sure you enter it correctly.
Solution 4: Try xcode-select --install in Terminal. This can sometimes force the installation of command-line tools if Xcode’s internal mechanism is failing.
Solution 5: Restart Xcode and Mac. A fresh launch might resolve temporary glitches.

Simulator download issues

Solution: Go to Xcode > Settings > Platforms. If a simulator download fails or is stuck, try pausing and resuming it within this window. Ensure you have ample disk space, as simulator runtimes can also be several gigabytes each.

By understanding these common pitfalls and their solutions, you can navigate the Xcode download and setup process with greater confidence, ensuring you get to the exciting part of developing apps with less hassle.

Frequently Asked Questions

How do I download Xcode on my Mac?

You can download Xcode on your Mac through two primary methods:

Mac App Store: Open the App Store app, search for “Xcode,” and click “Get” or “Download.” This is the easiest method for the latest stable version.
Apple Developer Website: Visit https://developer.apple.com/download/, sign in with your Apple ID, find the desired Xcode version including betas or older releases, and download the .xip file. Extract it and drag the Xcode.app into your Applications folder.

What are the minimum system requirements for Xcode?

As of late 2023, Xcode 15 typically requires macOS Ventura 13.5 or later.

You’ll need at least 8GB of RAM 16GB recommended and around 40-50GB of free disk space for the installation and initial setup.

A modern Intel or Apple Silicon processor is also required. Tdd in android

Is Xcode free to download and use?

Yes, Xcode is free to download and use for development.

You can develop, test, and run your applications on simulators and your own physical devices without a paid Apple Developer Program membership.

A paid membership is only required if you want to distribute your apps on the App Store or use certain advanced capabilities like Push Notifications.

Why is my Xcode download so slow?

Xcode is a very large file over 12GB, so download speeds can vary.

Common reasons for slow downloads include slow internet connection, high network traffic, or temporary issues with Apple’s servers.

Try pausing and resuming the download, restarting your Mac, or checking your internet speed.

How much disk space does Xcode take up?

A fresh Xcode installation usually takes up around 30-40 GB of disk space.

However, with additional components, simulators, derived data, and project files, the total space used can easily exceed 50-100 GB.

Can I download an older version of Xcode?

Yes, you can download older versions of Xcode directly from the Apple Developer website https://developer.apple.com/download/. This is useful for maintaining compatibility with older macOS or iOS versions or for specific project requirements.

Do I need an Apple Developer account to download Xcode?

While you can download the latest stable Xcode from the Mac App Store without explicitly logging into a developer account, downloading from the Apple Developer website always requires you to sign in with an Apple ID, which automatically creates a free developer account if you don’t have one. What is android integration testing

What are Command Line Tools for Xcode and do I need them?

Command Line Tools CLT are essential for developers working with command-line utilities, compilers like clang, and building software from the terminal.

Many development workflows, even outside of Xcode’s GUI, rely on them.

You can install them via xcode-select --install in Terminal or through Xcode’s first-launch setup.

How do I install Xcode from a .xip file?

After downloading the .xip file from the Apple Developer website, double-click it to extract the Xcode.app file.

Once extracted, drag the Xcode.app file into your Mac’s Applications folder.

The first time you launch it, Xcode will prompt you to install additional components.

My Xcode download failed, what should I do?

First, check your internet connection and ensure you have sufficient disk space.

If downloading from the App Store, try pausing and resuming the download.

If downloading a .xip file, try re-downloading it from the Apple Developer website.

A restart of your Mac can also resolve temporary issues. What is test automation

Can I have multiple versions of Xcode installed on my Mac?

Yes, you can.

When downloading from the Apple Developer website, simply rename the Xcode.app file after extraction e.g., Xcode 14.app, Xcode 15 Beta.app before moving it to your Applications folder.

Use sudo xcode-select -s /path/to/Xcode.app/Contents/Developer in Terminal to switch between versions for command-line builds.

How do I update Xcode?

If you downloaded Xcode from the Mac App Store, updates will appear in the App Store’s “Updates” section.

If you downloaded it from the Apple Developer website, you’ll need to manually download the new .xip file from the website and replace your existing Xcode.app or install it alongside if you keep multiple versions.

What should I do if Xcode says “damaged and cannot be opened”?

This usually means the download was incomplete or corrupted.

Delete the current Xcode.app and the .xip file if applicable and re-download Xcode.

Ensure you have a stable internet connection during the download.

How do I free up space taken by Xcode?

You can free up space by deleting content from ~/Library/Developer/Xcode/DerivedData/, removing old or unused simulator runtimes via Xcode > Settings > Platforms, and clearing out old iOS Device Support files from ~/Library/Developer/Xcode/iOS DeviceSupport/.

What is the purpose of Xcode simulators?

Xcode simulators allow you to test your applications on various virtual iOS, iPadOS, watchOS, and tvOS devices and different OS versions directly on your Mac, without needing to transfer the app to a physical device. Browserstack named leader in g2 spring 2023

This speeds up the development and testing process.

Can Xcode run on Intel Macs and Apple Silicon Macs?

Yes, Xcode runs natively on both Intel-based Macs and Apple Silicon M1, M2, etc. Macs.

Apple Silicon Macs generally offer significantly faster build times and better performance due to their optimized architecture.

Why does Xcode take so long to install additional components on first launch?

The “additional components” are essential developer tools and frameworks that Xcode needs to function fully.

These are downloaded and installed after the initial Xcode application is in place.

The time taken depends on your internet speed and Mac’s performance.

Is it better to download Xcode from the App Store or developer.apple.com?

For most users, the Mac App Store is more convenient as it handles the entire process and updates automatically.

However, developer.apple.com is necessary if you need specific older versions, beta releases, or prefer to manage multiple Xcode installations manually.

Can I use Xcode for cross-platform development?

While Xcode is primarily for native Apple development, you can use it in conjunction with cross-platform frameworks like React Native, Flutter, or Xamarin.

These frameworks generate native iOS code that still requires Xcode to compile and deploy to Apple devices. Difference between continuous integration and continuous delivery

What should I do after installing Xcode?

After installing Xcode, launch it and allow it to install any “Additional Required Components.” Then, you can configure your Xcode preferences e.g., text editing, key bindings, add your Apple ID to Xcode accounts, and start a new project to familiarize yourself with the environment.

Download xcode on mac