I tried to buy this game for mac, it was a mistake because it is unplayable.
Almost all the characters are invisible, I have already requested a refund.
If you have a mac so avoid this game.

Today I contacted the official support for this game.
I did it on the advice of gog support.
Even if they could not fix the problem, they said they will do so as soon as possible and they have responded in a very few minutes to my emails.

Since I do not know how long it will take them to fix the bug, I requested a refund anyway.
But I wanted to point out two things:
1. The excellent support.
2. The fact that they are working to fix the bug.

I, when they will fix the bug, will buy the game again.

I got my issue refund