Project File Format Compatibility and Versioning

Project File Format Compatibility and Versioning

Xcode 4 reads and builds projects created in Xcode 2.1 through 3.2.3. Projects created with Xcode 4 can be opened and built on Xcode 3.2 through 3.2.3.

Opening and building a project in Xcode 4 does not upgrade or alter it. Changes you make to a project in Xcode 4 are compatible with earlier versions of Xcode.

Technical Support and Learning Resources

Apple offers a number of resources where you can get Xcode development support:

• http://developer.apple.com: The Apple Developer website is the best source for up-to-date technical documentation on iOS and OS X.
• http://developer.apple.com/technologies/tools/: The Xcode home page on the Apple Developer website provides information on the developer tools.
• http://devforums.apple.com: The Apple Developer Forums feature a dedicated Developer Forum for Xcode 4 Developer Previews.

Use http://bugreport.apple.com to communicate issues with Apple. Include detailed information of the issue, including the system and developer tools version information, and any relevant crash logs or console messages.

To send comments or feedback on the Xcode Tools suite to Apple, use xcode-feedback@group.apple.com.