Fixed CMake linking on MacOS (#1783)

Added links to IOKit, Cocoa, and OpenGL to the CMake build file for MacOS platforms

projects/CMake/CMakeLists.txt

@@ -34,4 +34,11 @@ add_executable(${PROJECT_NAME} core_basic_window.c)
 #set(raylib_VERBOSE 1)
 target_link_libraries(${PROJECT_NAME} raylib)
 
+# Checks if OSX and links appropriate frameworks (Only required on MacOS)
+if (APPLE)
+    target_link_libraries(${PROJECT_NAME} "-framework IOKit")
+    target_link_libraries(${PROJECT_NAME} "-framework Cocoa")
+    target_link_libraries(${PROJECT_NAME} "-framework OpenGL")
+endif()
+
 # That's it! You should have an example executable that you can run. Have fun!