Guest EvanJ1 Posted May 30, 2022 Posted May 30, 2022 I have a early 2009 Mac Pro running Mojave (via dosdude). I had successfully installed Monterey 12.3.1 onto a disk partition using OpenCore Legacy Patcher. However my second monitor was not working in 12.3.1 in so I erased the partition and the USB drive with disk utility, And made a new USB installer with an older OS 12.2.1. BIG MISTAKE Now I can not get the boot picker to show up when I hold restart holding down the option key It just boots into the regular OS. I tried to made... Read more Source: MacRumors
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