In your Xcode build settings you need to have a User Defined setting: GCC_ENABLE_OBJC_GC = supported If that’s missing it could be the answer. But given my experience and comments from others I really wonder whether it’s worth the effort, as long as you can still fall back to a working version on 10.8.5. Steve On 3 Nov 2013, at 19:10, rob ista <rob.ista@me.com> wrote:

Steve? Where is it then? Is it de-activated or sth? When I try to run a simple macruby app in xcode i get an error message that the GC is depreciated. Rob

The garbage collector is deprecated but it's still there in Mavericks.

Steve

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