That said when not wanting to go for such heavy modding, then there is another way to run the latest OS X on those old mac pros with 32-bit EFI.
That's one option if one wants to be able to run the latest OS X on a 1,1/2,1 mac pro. While isn't really worth to embark in a 4,1 to 5,1 motherboard transplant, when it comes to 1,1 and 2,1 to 3,1 it might to get native support for the latest OS X (at the time of this writing is EL Capitan with Sierra being in Beta) Besides the difference between those builds isn't so drastic that would justify spending time and effort on doing such "upgrades" also because the price to buy 4,1 or 5,1 mac pros on sites like ebay for instance, are certainly not prohibitive (although it can get a bit pricey if wanting to assemble the most beefed up version possible before the mac pro 6,1). It's likely that something similar could be accomplished with the 4,1 and 5,1 builds but that I don't know as I've not looked into it. but for the above all ram chips will run at the lowest speed when faster and slower modules are installed. One could also mix modules given that 800MHz ram can run at slower clock speeds. versions) which means that when using the ram from an older model in a 3,1 motherboard it would run at lower clock speed since, even if the FSB on the 3,1 can run at 800MHz, the Ram will dictate the speed which will therefore be set at 667KHz (lowest common denominator) by those modules. If you're talking of what makes the most sense (swapping a 3,1 motherboard into a 2,1 or 1,1 mac pro) then it sounds like mac pro 1,1 through 3,1 can indeed share hardware with some minor caveats and limitations.įor instance a 3,1 has a faster memory clock speed (800MHz vs 667MHz of prev. as there are many iteration of such product you can't simply say Mac Pro without giving its model identifier (1,1 through 6,1 at the time of this writing) First and foremost you should always provide the most important detail when you talk about "my Mac Pro".
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