There isn't a more expensive Mac option to buy if what you're after is a gaming GPU. It's more likely that the VM team sees this as a very low benefit ticket to pursue given the tiny segment of Mac gamers hoping to improve their options with a Linux VM for gaming.

(Meanwhile, I'm recompiling Wine to see if I can patch it to address an issue that was hotfixed in Proton two weeks ago but isn't in a CrossOver build yet, so yeah, there's maybe some arguments to be made here that I'd be a potential beneficiary. If I weren't too cheap to spring for an eGPU in today's market, anyway.)

The entitlement in question is the standard `com.apple.developer.driverkit.transport.pci` [0], required for anything that touches the PCIe bus [1]. Apple is generally restrictive with how much third-party applications can do on machines with SIP/"full security", so I'm not exactly surprised. It's not an Apple-private entitlement, however.

The VFIO-style driver made by the author of this also appears generic enough to support all kinds of PCIe, not just GPUs. Apple might find a way to weasel out of this ("hey, this is for hardware companies and you don't seem to be affiliated with one", "your driver requests too broad access", etc.) if there really is a conflict of interest, but so far, there's a chance it will just get rubber-stamped.

I can see them rejecting it for legitimate reasons, though, at least as far as "legitimate" with Apple goes. This driver is essentially a thin layer over PCIDriverKit, exposing all functionality that's supposed to be behind the entitlement to arbitrary applications, in similar fashion to WinRing0. They probably didn't come up with all this bureaucracy only to sign something like that in the end. We'll see what happens.

[0] https://github.com/scottjg/qemu-vfio-apple/blob/84ecdcf5db6b...

[1] https://developer.apple.com/documentation/pcidriverkit/creat...