Bootscreen Enabled EFI RX 580 8GB Sapphire Nitro+ For Mac Pro Tower 4,1/5,1
1 x RX 580 8GB NITR0+ GPU W/ Apple Boot-screen Support (DUAL BIOS). Apple Mac Pro 4,1 (2009) or Mac Pro 5,1 (2010-2012). Dual Bios (one standard and one with Boot Screen). Installed macOS 10.13.4 or newer.