Not starting on mac

Sorry if this has been asked before, or is in the forum already, but i just bought Aerofly fs 2 on steam, and it wont start on my mac. It does not open when i press play, it closes right after opening. I have macOS 10.14. If i cant get it working i will sadly have to request a steam refund.

any help would mean a lot. thanks

admin sure. I see now, that it is running mac os 10.13.6 not 10.14 , but its an mac from july 2011, so not too new, so maybe that can be an issue, but it run other games that is more demanding good, and it has more than enough storage space for aerofly fs 2 . If you need more info i would happely see if i canfind more.