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This topic has been covered in the past but all those guides appear outdated, have broken links, needlessly complicated processes, or a combination of all those. If you are one of those people or know one of those people that have a 2009 4,1 Mac Pro and want to squeeze another decade of life out of it, this page is for you! I took this knowledge for granted, forgetting there’s a whole world of people out there that have no idea this knowledge exists. They don’t see this kind of information on a daily basis like this geek. But there are many Mac Pro users that are not aware of those communities or of the upgrade potential and possibilities for their Macs.
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Hanging out in the various Facebook groups and other communities, I rarely run into anyone anymore that has a 2009 4,1 Mac Pro that still runs the stock firmware.
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