I'm on the search for a good XCode 4 and MacOS development book and tutorial.<p>Everything I've found either concentrates on Xcode 3, which is significantly different or iOS development, not MacOS.<p>If you have a good resource for MacOS development, can you please share?
There are loads of great resources out there for learning Cocoa for Mac development but because Xcode 4 is so new you aren't going to find much aside from Apple's own documentation.<p>But I strongly recommend you check out Programming iOS 4:
<a href="http://oreilly.com/catalog/0636920010258" rel="nofollow">http://oreilly.com/catalog/0636920010258</a><p>It's still in development and has just been updated to cover Xcode 4. I've been reading the previous edition and it's brilliant: great writing and the first half of the book is applicable to both iOS and desktop Cocoa development. As a relatively new Mac developer (1-2 years) this really consolidated my knowledge of Apple's frameworks and Objective-C.
The mechanics of using XCode 4 are somewhat different, but all the fundamentals are identical. As far as documentation goes, Apple's online docs are a surprisingly good starting point.