Stop unity project from playing when not responding

I realize t$$anonymous$$s is a silly question, but in a project I am working on, I added code in a broken loop that plays on start and ends up cras$$anonymous$$ng unity. I am trying to fix the problem, but it is annoying to have to force quit the project every time I want to try playing it again. I want to know if there is a better way to do t$$anonymous$$s by stopping the project once it takes up a certain amount of processing power, or if there is any way to stop the project once unity stops responding. I am on a mac, if that helps