Force set CMAKE_OSX_DEPLOYMENT_TARGET to 10.15

Author: Paulchen-Panther

CMakeLists.txt

@@ -176,7 +176,7 @@ endmacro()
 if("${PLATFORM}" MATCHES "osx")
 	# specify the min version of the target platform (only GitHub Actions)
 	if(DEFINED ENV{GITHUB_WORKSPACE})
-		set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15")
+ 		set(CMAKE_OSX_DEPLOYMENT_TARGET 10.15 CACHE STRING "Minimum macOS version the build will be able to run on" FORCE)
 	endif()
 
 	# add specific prefix paths