What are the things to develop in Mac OS? [closed]

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I just got myself a Mac. I have been a java + 开发者_如何学Gophp developers and also web designer for 4 to 5 years.

I like to query what are the things to develop in Mac?

I am currently getting started in iphone app development for learning purpose

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If you are looking to start developing applications for the iPhone, there is a wealth of knowledge over here that will help:

http://developer.apple.com/devcenter/ios/index.action

You will need to download Xcode, and the iOS SDK, both of which are available on that page.