On Sep 18, 2015, at 00:51 , Dave <[email protected]> wrote: > > Is it possible to target Mac OS X Versions < 10.11 using the newly released > XCode 7? I’ve installed it and opened a test project. > > I look in the Project Settings and under General the deployment target is set > to 10.11 - I set it to 10.9,
That’s what “targeting” is — setting the deployment target. > then in the Build Setting section I notice that the Base SDK is set to 10.11, > I click on the pop up but 10.11 (and iOS 9.0 and WatchOS 2.0) are the only > options. Do I need to install the SDKs for previous versions of Mac OS X and > iOS? If so where/how to I install them? The Base SDK 10.11 defines the API for *all* target versions up to and including 10.11. Your code restricts itself to what’s available for your target, or (using run-time checks) to what’s available on the OS under which your app is launched. (In Obj-C or Swift, you get warnings if you try to use API that’s too old — deprecated. In Swift, you *also* get errors if you try to use API that’s newer than your target version. Your explicit availability checks disable these errors.)
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