> You cannot even use Nvidia/AMD/Intel DGPUs with AS Macs
afaik you technically can, except that m1/m2 force pcie bars to be mapped as device memory (forbids unaligned r/w), so most gpu software (and drivers) that just issue memcpys to vram and expect the fabric to behave sanely will sigbus. it's possible to work around this, and some people indeed have with amdgpu, but it'd absolutely destroy performance to fix in the general case
so it doesn't really have anything to do with apple themselves blocking it but rather a niche implementation detail of the AS platform that's essentially an erratum
afaik you technically can, except that m1/m2 force pcie bars to be mapped as device memory (forbids unaligned r/w), so most gpu software (and drivers) that just issue memcpys to vram and expect the fabric to behave sanely will sigbus. it's possible to work around this, and some people indeed have with amdgpu, but it'd absolutely destroy performance to fix in the general case
so it doesn't really have anything to do with apple themselves blocking it but rather a niche implementation detail of the AS platform that's essentially an erratum