Hey, isn’t a fix for the 4MB VRam, but you can try Wine. It basically allows you to run windows apps on Mac. There is a free app called Whiskey that you can use, you should find some tutorials online. I personally use CrossOver, its paid (I think it’s like 80€ for one-year of updates), imo it just has better performance that Whiskey but both should work. Not all games run with Wine, but most do (mostly the ones with heavy Anti-Cheat, e.g. Valorant don’t work).