To provide a somewhat definitive cap statement to this question, as of November 2021 the MacPro3,1 (2008) is really beyond obsolete in the modern macOS world. These days, that's just the recovery partition on my Time Machine drive, but 10.6.8 doesn't have a recovery partition.įor belt & braces, I'd clone your exiting drive using something like Carbon Copy Cloner then remove it, so it doesn't cause confusion. I've never managed to get a 3,1 to boot from USB I've always needed a ready-prepared second HD. I would also make sure you have a tested, bootable, recovery path should anything go wrong during the update. Be certain you have an up to date backup & be prepared for the fact that a large number of your existing apps, if they are the same age as the OS, will also need updating. I would, however, be wary of such a long jump in one go. I have one here running just that.Īs of Sierra, 10.12, the above still remains true, yet further clarified - El Capitan is the final OS to support the 3,1 The Mac Pro 3,1 Can quite happily run the current OS X - at time of writing El Capitan 10.11.3.
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