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I am developing a Mac app (using Xcode 4.2). My observation during testing is that its working properly on Snow Leopard but few of the buttons/functionality is not showing the expected result on Lion.
Why is that? Do I need to upgrade the Xcode or some libraries needs to be included?
Any kind of help would be useful as I am a newbie in Mac development.
Change deployment target. This identifies the earliest OS version on which your software can run. By default, Xcode sets this to the version of the OS corresponding to the base SDK version and later. You can change that either on the project settings summary screen or in the project settings configuration settings.
Take a look at SDK Compatibility Guide.