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CMAKE_OSX_DEPLOYMENT_TARGET
---------------------------
-Specify the minimum version of OS X on which the target binaries are
-to be deployed. CMake uses this value for the ``-mmacosx-version-min``
-flag and to help choose the default SDK
-(see :variable:`CMAKE_OSX_SYSROOT`).
+Specify the minimum version of the target platform (e.g. macOS or iOS)
+on which the target binaries are to be deployed. CMake uses this
+variable value for the ``-mmacosx-version-min`` flag or their respective
+target platform equivalents. For older Xcode versions that shipped
+multiple macOS SDKs this variable also helps to choose the SDK in case
+:variable:`CMAKE_OSX_SYSROOT` is unset.
If not set explicitly the value is initialized by the
``MACOSX_DEPLOYMENT_TARGET`` environment variable, if set,