![]() ![]() Download the full Mac App Store installer for Mojave.Now check if your Mac Pro BootROM is 00, if yes you can shutdown, remove all non-METAL GPUs (a non-METAL GPU installed will block you from installing Mojave) and install your Metal capable GPU (any AMD equal or newer than HD 7xxx, NVIDIA GTX 680 Mac Edition, Quadro K5000 and other NVIDIA Kepler cards). ![]() After the firmware upgrade, High Sierra installer will open again, you can close it.Open the High Sierra 10.13.6 Mac App Store full installer, do the firmware upgrade as asked.Note, if you never used Mac App Store before, you need to validate your account first and download a free app before trying to get High Sierra This is the Apple Support page where you can get the link for the 10.13.6 Mac App Store Installer (you need this even if you already are on 10.13.6).You need the current High Sierra 10.13.6 full installer from the Mac App Store, no previous version have the needed 00 BootROM. If you ever downloaded any previous version of High Sierra, have it saved in any of Mac Pro external drives, you have to delete it/move to a offline disk and then restart your Mac.If you use a SATA III PCIe card, remove the card from your Mac and move the drive to one of the backplane native SATA ports, a lot of people report trouble doing the firmware upgrade with SATA III PCIe cards installed.Disable FileVault2 if enabled, since FV2 is not supported anymore with a Mac Pro 5,1 running Mojave.If you monitor has a option to downgrade to DP v1.1 or a DVI port, use it, if not, you will need another monitor. You can't update to 00, or newer firmwares, with a 4K/DP v1.2/1.4 screen connected to a GPU that has hardware support for DP v1.2/1.4 (read the note). For GPUs that support DP v1.2/1.4, disconnect any 4K or DP1.2 display.Please note that if your flashed GPU is not macOS installer compatible, like NVIDIA GPUs from Maxwell and Pascal generations, you need to install one that is. Any original Apple card from 2008 to 2012 (HD 2600XT, 8800GT, Quadro FX 5600, GT120, HD 4870/5770/5870) or 3rd party Mac EFI cards like Sapphire HD 7950 Mac Edition, eVGA GTX 680 Mac Edition, NVIDIA Quadro 4000/K5000 or self-flashed/MVC flashed cards. Apple OEM GPUs or Mac EFI flashed GPUs are a requirement for upgrading to 00. PCIe drives are bootable, exactly as the internal ones. If you have an earlier than 00 BootROM version, these are the steps to upgrade your BootROM to have Mojave support: This part of the BootROM upgrade require a GPU with pre-boot configuration support. ![]()
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