![]() ![]() I'm not certain if the investment in a newer Graphics card is compulsory for functionality, or whether it's just to get the machine to be as fast as possible after the upgrade, same as the CPU swap at the end. Here is a guide on how to get Yosemite onto a 1,1 They reckon it can be done from USB, but I'd say YMMV & be prepared to have to run it from a spare hard drive instead. I've never been able to boot a pre-09 Mac from USB & I've tried pretty much everything the interwebz has to offer in that regard - though my oldest Mac Pro was an Early 08 so I've never needed to force it quite so hard, as I don't need to push the firmware upgrade too. ![]() I think whichever way you force the newer firmware, you're going to have to have the installer on HD or DVD. ![]()
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