Sooo apparently there's this myth that only Apple has "unified memory"...? Every single modern integrated graphics system works the same way. They even share the MM code in Linux. I just had a reply guy try to argue otherwise with me even when I told him I wrote the driver 😭 I know ancient iGPUs had that thing for setting the GPU memory size in the BIOS, but that's aaaaaancient and completely obsolete. If you still have that, just set it to the minimum value. The rest of memory will be unified. Apple dedicates a tiny bit of RAM secretly too!