My Sapphire RX 560 Pulse 4GB works with Lilu.kext & Whatevergreen.kext in EFI-CLOVER-kexts-others. I use iMac18,3 smbios. Only sleep & wake takes a bit longer.
What do you mean by natively ?Over at MacRumor's Mac Pro forum section, there are reports the Sapphire RX 580 Pulse 8GB cards is working natively. This is due to Apple offering (for sale) to developers that card in an external eGPU unit. Unfortunately, the Sapphire card was a favorite of the miners so the price of the card far exceeds the public release announcement MSRP of $229.
Natively = supported by Apple drivers in 10.12.6 and 10.13.What do you mean by natively ?
how about the Sapphire RX 580 Nitro+ 8GB, should it work also natively ?
Natively = supported by Apple drivers in 10.12.6 and 10.13.
With respect to (WRT) the Nitro, I don't know for sure as I made my choice on the Pulse based upon what I read in the MacRumor's Mac Pro forum section. IIRC, the Nitro doesn't show up correctly in About This Mac, but might work OK. I know for sure that the Pulse doesn't have the wake-up from sleep problem that AMD cards suffer from.
I don't know what that means. BTW, I added an update note to my post above....
Does your screen enter the power safe mode just before the macos log screen ? (i get that with a rx 560 pulse)