Also a Mac user, I prefer CurseBreaker to manage my addons.

Some other troubleshooting steps you could try are finding WoW under Applications, then renaming WTF to WTF_old and Interface to Interface_old (fully exit the game before you do this). The start the game back up, it will create new versions of those folders. You will lose addon settings, but there could be some corrupted files in there. If it does not fix it, you can delete the new folders and then rename the originals to not have _old and you will get all your settings back.

Completely uninstalling and reinstalling those addons is something else you might try.