Should under latest Xcode verisons.
Refactor > Convert to modern Objective-C syntax
The latest Xcode is not yet officially released. It's still in beta testing. I'll pull these changes after the official release.
XCode 4.4 will be official whenever Mountain Lion comes out in July.
XCode 4.3.3 includes these, this is available in the AppStore so I believe is official.
I don't see literals support in 4.3.3. And not the "Convert to modern Objective-C syntax". Command. 4.3.3 still uses LLVM 3.1 while 4.4 uses LLVM 4.0
My mistake - indeed it doesn't appear like these are in 4.3.3.
Xcode 4.4 is now released.