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Editorial Team
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Asked: 2026-06-08T17:17:55+00:00

Is there a way to make sure that an app will run on osx

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Is there a way to make sure that an app will run on osx 10.5 when compiling from osx 10.7 (xcode 4.4)?

Or at least, that it has successfully compiled for 10.5?

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1 Answer

  1. Editorial Team

    You should set the deployment target to OS X 10.5. Ensure that you don’t use any API that wasn’t available on 10.5 (or, if you do, that you use it weakly and have a fallback code path that will be used if the APIs aren’t available). Test your application on 10.5.

    Options for fallback coding:

    • test whether an API object responds to a selector introduced since 10.5
    • test whether a class introduced since 10.5 exists by getting a reference through NSClassFromString()
    • weak-link against SDK frameworks, discover at runtime whether symbols from these frameworks are NULL
    • dynamically load shared libraries with dlopen(), falling back if they don’t exist
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