Then post updating the Boot ROM you no longer need it. Best would be to get some cheap HP GeForce GT630 2 GB or DELL GeForce GT640 1 GB/GTX645 1 GB for PC (doesn't need to be flashed with Mac rom). If your current card doesn't support Metal (like factory installed NVIDIA GeForce GT120, AMD Radeon HD4870, HD5770 or HD5870) and your new card is too new to have High Sierra support (like RX5000/RX6000 series), then you need a helper card. If you have NVIDIA card make sure to have the latest Web Driver driver installed which can be downloaded from Drivers page, otherwise installer would complain about Metal support or FileVault enabled: My graphics card is Metal capable, but macOS Mojave installer still complains about lack of Metal support. If your macOS High Sierra partition is still running HFS+ filesystem it will be automatically converted to APFS after macOS Mojave installation. We recommend performing Boot ROM update and macOS Mojave installation with no other PCIe cards installed and a SATA drive connected to one of the internal drive bays. fixes critical CPU security bugs like Spectre & Meltdown etc. adds support for PCI-Express 2.0 (5.0 GT/s link) for all PCI-Express 2.0 or faster cards instead of much slower PCI-Express 1.1 (2.5 GT/s link) You need to update Mac Pro 5,1 Boot ROM in order to install macOS Mojave 10.14 and newer unsupported systems like macOS Catalina 10.15, macOS Big Sur 11 or macOS Monterey 12. Make sure that WiFi is set to Native-Plus and Boot Plist patching is enabled.Installing macOS Mojave 10.14 and performing Mac Pro 5,1 Boot ROM update.Once it's done, go back to the Advanced Patches screen. Press Start Unpatch Kexts and let it go.Change the mode from Patch Kexts to Unpatch Kexts.Click Advanced Patches and enter your password.Open Patched Sur and go to the Patch Kexts section. If you update to 11.6.5, the new patch will be used by default.Make sure you've made a new installer usb, you'll get errors if you neither the usb nor the pre-downloaded patches (obtained whenever you update or make a usb) isn't using the latest version.Non-metal Macs can no longer go past the verify stage (instead of just a warning, it just stops them there), not like they were ever supported anyway.You can no longer use the beta track, not enough people use it for me to justify keeping it (I haven't seen any recently), you can still download the beta installers on your own and tell Patched Sur to use those if you want.(It actually looks like it's doing something now)
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