![]() ![]() You need to remove all non-metal GPUs first during this operation and have a metal compatible GPU installed. The firmware is located on the installer, BTW. Using this installer to load Mojave onto your Mac will upgrade the boot ROM to the version you desire ( 144.0.0.0.0 ). with 1920x1200 pixels, 512MB NVIDIA GeForce Go 7950 GTX Graphics card. If you want to install Mojave onto your Mac once it identifies itself as a Mac Pro 5,1, make a macOS USB installer with the latest version of Mojave from an Apple server. (2 Apple MacBook Pro Want to run the Mac OS and Windows XP. ![]() Install a fresh macOS from an Apple server on a drive and disable SIP, if need be, to upgrade your Mac into a MP5,1. I have not succeeded in using a firmware restore disk with the cMPs. You want the most stable environment possible when you update firmware, because there will be no recovery options in reality if something goes wrong. I'd be suspicious of the OS install on the drive that came with your Mac. You can use the EFI GT 120 GPU as your only installed graphics card for this. You should first upgrade your Mac Pro 4,1 into a 5,1 using the Netkas firmware upgrade tool. ![]() It can be done with the Dos Dude patcher, to get an OS installed on unsupported hardware. I don't think it is possible to install Mojave on a Mac Pro 4,1 ( 2009 ) using the factory retail installer. Looks like someone installed a boot drive in your Mac that already had a Mojave install. ![]()
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