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Re: I can't find High Sierra. I need to install it.

Posted: Thu Mar 14, 2019 7:36 pm
by HCMarkus
Mac Pro users with upgraded GPUs one thing to look out for: you need a Mac EFI GPU to do the firmware update that High Sierra applies, then you need a Metal-compatible GPU to install Mojave. There are a few cards that satisfy both criteria, but most are one or the other.

Re: I can't find High Sierra. I need to install it.

Posted: Fri Mar 15, 2019 5:58 pm
by mikehalloran
Babz wrote:Well, FWIW, according to this, it should be possible to upgrade from El Capitan to Mojave, skipping High Sierra.

https://www.imore.com/updating-macos-ultimate-guide
No reason to doubt it. Mojave installed another firmware update on mine even though incompatible with my iMac.