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How To Build iPhone 3.0 and iOS4 Apps On The Same Machine

It’s actually really easy, here’s how I’ve set it up:

Install the XCode 3.2.3 with iOS4 in /Developer

Install XCode 3.2.2 with iPhone OS 3.2 in /Developer322

Install latest XCode 4.0 developer preview in /DeveloperBeta

This makes it trivially easy to support the older SDKs and toolsets for handling your legacy iPhone applications.

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