Hello orange! Not to keep beating a dead horse here but even with this recent update, Mac users cannot save their game. I've researched this a lot and have yet to come up with an answer.
Edit: I found this thread on the RPGMaker Forums:
Unable to save in deployed Mac version, and Mac only error after accessing options
The advice offered in the very last post I've tried with this update of your game and the previous one I purchased. Unfortunately it does not work.
If there is anyway you can compile your game on a modern MacOS machine to offer as a Mac version, I'd be grateful as would any other Mac purchaser.