Can't launch the Steam version of FGC on a mac

[fantasmamore]

Hello all,
THE PROBLEM
Every time I try to launch FG Classic through Steam on my mac I see the icon on the doc but no window opens and after a few seconds even the icon disappears - it doesn't even give me a warning. There is no way to run the program.
WHEN IT HAPPENED
It was perfectly working. At some time I uninstalled FG and a few months after that I installed it again. It never run.
WHAT I DID TO SOLVE IT
I tried uninstalling FG and then installing again.
I uninstalled / installed again the entire Steam.
I manually deleted a small file that remained in /Users/*me*/Library/Application Support/Steam/steamapps/common between installations.
I verified the integrity of the files. Steam gave me a warning that 3 files were wrong and asked to install them again - which I did. It downloaded 27 kbs. When I check the integrity of my files at that point, everything looks good. I run FG again, it never opens, integrity of my files is damaged again.

Do you have any idea of what could be wrong?
Is there any way to totally/completely/perfectly delete everything FG-related from my mac and then install again clean?
Thank you all!

P.S. My iMac is a late-2009 model, running High-Sierra, this is not a problem of 32bit apps etc.

[Zacchaeus]

I don't know enough about macs really to advise but have you tried downloading and installing from the Website rather than through Steam? I do know that FG Classic doesn't run natively on a mac so you do need Wine or some other emulator in order to run it. Also just make sure that you are trying to install Classic and not Unity.

[fantasmamore]

[...] have you tried downloading and installing from the Website rather than through Steam?

I will probably try that, but I want to find a solution with my steam client if I can... Thank you for your help!

[Zacchaeus]

You can always activate it in Steam at a later time.