Hello,
we've tested the game under OS X 10.15 and haven't found any issues regarding the TTS.
However, the game has some rights requirements to write the save files to the hard drive and before it enters the main menu there's a popup asking for permissions. That message is integrated into OS X and not into the game though. Did OS X read that to you? Otherwise maybe you have to tab back into the game.
It could also be that you are pressing CTRL+V too early. When you're hearing the main menu music did you try pressing CTRL+V then?
Best,
Kevin