Try that and see if it works
I’ve tried doing this with Winetricks but it hangs right after Wine is launched to apply the setting.
After trying 2 other apps using other iterations of Wine (Winebottler bundled), I found that those don’t work either. In each case, several processes related to Wine get started (such as wineserver) but no GUI stuff gets created whatsoever.
Using ‘Command Line Wine Test’ from the Wineskin menu, I can definitely confirm the Wine process is responding to Terminal commands, even Winetricks is open to commands. Yet I don’t know if it’s even possible to set videomemorysize from there. I have tried looking it up but couldn’t find any clear info. I could only get it to list the Winetricks settings.
Anyway, it seems like the problem is likely at the Wine engine itself rather than the wrapper like Wineskin, as at least anything GUI related on any iteration of Wine will hang. Still I really wonder why that doesn’t happen on the Mac Mini. Video RAM is the same on both systems, it’s just the GPU model number is a slightly newer version on the Macbook Air. Software is the same, as well as most accounts and settings on the OS.
I’ve been thinking, maybe the difference is with the screen initialization? The Mac Mini’s monitor is connected through a DVI interface while the MacBook’s internal screen uses the DisplayPort protocol. Maybe Apple changed the DisplayPort protocol in a way that Wine doesn’t understand? It’s just an idea, and I don’t have a Thunderbolt to HDMI adapter or AirPlay compatible TV to test this with an external screen.
Maybe someone else with a MacBook, or especially the MacBook Air from 2015, could test Fusion or any other Wine app? I doubt that I’m the only person with this persisting problem.
And lastly, after I try to start any GUI Wine process that hangs, I can’t properly restart or shutdown the Mac during that session, even after manually force quitting all processes created by the Wine app. The shutdown screen will show the grey ‘circle’ spinning forever until I hold the power button. Seems like that MacBook hasn’t got a taste for Wine.. :p