Xcode 4 GM Released for Developers

Feb 3, 2011 - 6 Comments


Apple has released Xcode 4 GM for those who are enrolled in the Mac and iOS development programs. Xcode 4 is a significant update to the Xcode IDE and includes both iOS SDK 4.2 and Mac OS X SDK 10.6.

According to early reports, XCode 4 GM allows developers to submit iOS and Mac apps directly to their respective App Stores. Other improvements include:

Xcode 4 has a brand new, single window interface for all major workflows

Interface Builder is now integrated within the main Xcode IDE

Assistant shows a paired editor with complementary files (headers, UI controllers, etc.)

Fix-it highlights code where an error is detected, as you type, and can even fix it for you

Version editor shows a live comparison through SCM history, using Git or Subversion

LLVM compiler 2.0 includes full support for C, Objective-C, and now C++

LLDB debugger is faster, and uses less memory than the GDB debugging engine

– see notes below on how to enable the LLVM compiler or LLDB debugger

Instruments adds System Trace, and new iOS instruments including OpenGL ES

XCode 4 requires Mac OS X 10.6 to install, if you are a developer you can get the GM release from Apple’s Developer Center.

Update: That came and went quick, Xcode 4 GM build has now been pulled.

Update 2: Xcode 4 GM is back again for downloading from Apple’s Dev Center.


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Posted by: Paul Horowitz in Development, Mac OS


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  1. Josh says:

    Are you allowed to submit apps to the App Store that you build with this version? Weren’t previous versions only for testing?

  2. Tjp says:

    I can’t get the LLDB enabled. The drop down just has “none” and “GDB”. I have tried a newly minted project as well as an existing xcode 3.2 project engaged in the xcode 4 GM environs.

    Any other settings in the build info that need changed. Oh yes, I have changed the compiler choice as well to both GCC-LLVM and LLVM with no effect on getting the LLDB set.

  3. Zach says:

    @James – You should not have too much trouble switching between the two platforms. I was in a similar situation to you, and I had very few difficulties using Xcode.

    However, if you are using C++/CLI, that will not run on Mac OS X or any other OS since it depends on the .NET platform. At least not without using something special to do it.
    I’m not sure if that is what you meant by Visual C++.

    In that case though, you would want to learn Objective-C and Cocoa for doing graphical user interfaces on Mac OS X. Most experienced programmers should have little trouble picking these up.

    I’d suggest
    Learning Objective-C on the Mac

    Learning Cocoa on the Mac

  4. James says:

    I’ve never written a Mac program. If I did a program (C++ and/or Visual C++) on Visual Studio, how easy would it be move that to the Mac platform?

    I’m guessing straight C++ could be compiled pretty seamlessly but Visual C++ would be right out.

  5. Victor says:

    Why was it taken down? And wouldn’t Xcode 4 have iOS 4.3 SDK and not 4.2? Maybe this was a mistsake.

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