The Mac Pro 4,1 can be flashed to a Mac Pro 5,1 rather easily after upgrading to Westmere CPUs (a 4,1 must use “delidded” CPUs – so pay attention to that when buying a used machine if you want to upgrade). On a side note, as much as we get annoyed with Apple and some of their planned obsolescence tactics for various generations of Macs, I do have to give them some credit where credit is due. Syncretic was also instrumental in solving the infamous “race condition” that stopped versions of MacOS working properly with OpenCore beyond Big Sur 11.2.3 (more on that below) through the most recent build of Monterey. In some of the latest developments for keeping the Mac Pro 5,1 humming along a few very powerful (recently released) GPUs have even become possible to use with the Mac Pro 5,1 (something believed to be impossible previously) thanks to MacRumors guru “Syncretic” unraveling the reason why these cards would not work in a Mac Pro 5,1 before and developing a patch for the Bios to flash (more on that in a bit). The Mac Pro 5,1 has rode a heck of a wave thanks to a talented team of developers who have worked hard to keep these old machines running smoothly with OpenCore/OpenCore Legacy Patcher (and some other tools/patchers that were developed earlier such as the dosdude1 patchers) and has allowed the Mac Pro 5,1 (as well as other machines) run well beyond their planned years of use that Apple intended.Īdditional thanks to Martin Lo’s OpenCore package, which has taken much of the tricky programming and settings that would otherwise need to be manually tweaked in an easy to deploy package that even the average user can handle.
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