Use the Finder context menu (that is, right-click on the project) and select "Get Information"
The “Open With” section is located in the window that appears - use this to select the appropriate version of Xcode, and then use the “Change All” button to indicate that it should be used for all projects.
On my machine, I renamed Xcode.app for Xcode 3 to Xcode 3 , which makes it easy to distinguish between the two versions.
Matt Lacey Dec 16 '11 at 9:32 a.m. 2011-12-16 09:32
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