OSX_COMPATIBILITY_VERSION

What compatibility version number is this target for OSX.

For shared libraries on Mach-O systems (e.g. macOS, iOS) the OSX_COMPATIBILITY_VERSION property correspond to compatibility version and OSX_CURRENT_VERSION to current version. See the FRAMEWORK target property for an example.

Versions of Mach-O binaries may be checked with the otool -L <binary> command. If OSX_COMPATIBILITY_VERSION is not set, the value of the :prop_tgt:SOVERSION property will be used.