So I know there are many questions about call of duty 4 hacks for mac....
I have a solution (It's maybe not the best way, but it's a way + it's FREE!!!!!)
First off all you need to have wineskin, just make a wrapper and stuff (if you don't know how to there are many tutorials on youtube)
Then just download call of duty 4 for windows. Then download a hack open it with the same wrapper as call of duty and there you go.