Guest superlativo Posted October 9, 2023 Posted October 9, 2023 Mac Pro 5.1 SSD #1 High Sierra / Monterey SSD #2 Windows 10 OCLP 1.0.1 EFI (Macbook Air) Yes, I'm a loser I wanted to update to Sonoma and created the USB on my Macbook Air. I forgot in OCLP to select Mac Pro and created the USB for the Macvook Air. So I upgraded my Mac Pro with the efi for the Macbook Air. Yes I am stupid. Currently, the forbidden sign appears in the boot picker if I select High Sierra or Monterey, but if Windows 10 starts, it is fully operational. I booted into... Read more Source: MacRumors
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