Hi SharkyMaster,
Ah yep, we've seen this error before. Thankfully there is a guide on how to fix it here: https://forums.rpgmakerweb.com/index.php?threads/unable-to-save-in-deployed-mac-version-and-mac-only-error-after-accessing-options.101878/#post-913712
Try that and see if it resolves the issue!