Yannok67: Hello there,
Just to give you some update on the current post. With the help of GOG support tech, I reverted the game to the previous version, and after another verify/repair, the game is now working back. I should be very happy but not completely, as I refuses to load my saved games, only let me start a new campaign... anyway, I'm making some progress.
crispyflakes: Hey thanks for the update. Sucks about he saves not working, If you scroll through the save, maybe if you match the version number of your game with the version you saved - it might work?! I guess you probably tried it already.
But over all I'm very happy for you the game is now at least working. Maybe this time you could make different decisions and have a completely different experience!!
Guess what? After updating my Mac to the latest version of Mac OS Sonoma, and upgrading the game to the latest patch once more, and verify/repair, it finally manage to work! I couldn't believe it, it even allows me to load my saves... so happy. It took me about 10 days, but now it seems to work normally :-)
Thanks for your support Crispy Flakes...