There's software called "Forex Tester 3" which may be able to do what you want.
I bought "Forex Tester 2" a long time ago, found it very useful and helpful, and was very glad I'd bought it. Version 3 is much newer and probably even better.
I have no idea whether it's Mac-compatible.
Anyway, I'm suggesting it because there's a free demo version available, so you can try it without commitment and see what you think?
(Google will find it for you. For what it's worth, my experience was that version 2 was very good value, and they were honest people to do business with. I think they also have a support forum for customers - they used to, anyway.)