Hi, so the issue is with MacOS. There's a workaround though! Go to the CCDBmv folder, right click the "Game" application, and select "Show Package Contents." In that folder, go to Contents > MacOS > and select nwjs. Press OK for any popups that come up and the game should launch. You should now be able to save/load and change volume settings. You'll have to launch it this way every time you play.
So sorry for the inconvenience and thank you for your patience. Getting things to work on mac is the bane of my existence. Do let me know if this doesn't work for you!