The explanation is in
this post above, see the section for OFW. If you experience difficulties, please be specific to be able to help you.
Actually, I am completely sure it will work if you own a digital version of the game as you need to back it up to your computer (a Mac in your case) with (Q)CMA, replace your game save with mine through psvimgtools (download the one for OSX) and finally transfer the game again to your device.