Link to system frameworks.

CMakeLists.txt

@@ -321,6 +321,9 @@ if (APPLE)
 	set(LOVE_SRC_COMMON ${LOVE_SRC_COMMON}
 		src/common/macosx.mm
 	)
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} objc)
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} "-framework CoreFoundation")
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} "-framework AppKit")
 endif()
 
 source_group("common" FILES ${LOVE_SRC_COMMON})
@@ -1612,6 +1615,7 @@ if(APPLE)
 	set(LOVE_SRC_3P_PHYSFS ${LOVE_SRC_3P_PHYSFS}
 		src/libraries/physfs/physfs_platform_apple.m
 	)
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} "-framework IOKit")
 endif()
 
 add_library(love_3p_physfs ${LOVE_SRC_3P_PHYSFS})