Thank you MarianneR, that doesn't seem to work for me. I installed Wine and now when I rightclick on the Victora.exe file and choose OPEN WITH (Wine) a window opens "Creating My new Wine prefix" and then nothing happens (still nothing after 20 min.).

I just found that CrossOver is a more "sophisticated" version of Wine so I bought it from the App Store but here I get the error message (see picture below)

http://tinypic.com/r/16gzoqu/5

What am I doing wrong?