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38

answers:

2

Well I guess at http://www.opensource.apple.com/source/objc4/ but where exactly? objc4 doesn't sound much like Objective-C 2.0.

+2  A: 

If you read the source code in that directory, it sounds a lot like Objective-C 2.0. Based on the included release notes, it appears to be the version from 10.5.

Chuck
A: 

That "4" refers to the build train of the compiler, not the version of the language.

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