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AFAIK, installing/updating unsupported OS versions via OCLP doesn't update firmware. It certainly hasn't on my MacPro6,1 running Sonoma (have 478, current is 48
by jasomill 2y ago
AFAIK, installing/updating unsupported OS versions via OCLP doesn't update firmware. It certainly hasn't on my MacPro6,1 running Sonoma (have 478, current is 481); the workaround is a PITA (Monterey only updates firmware if installed on the internal SSD, so I either need to buy a spare or backup / clean install / restore) and probably not worth the trouble.
Other than this, OCLP + Sonoma on the MacPro6,1 is fantastic.