Drawbridge Posted December 23, 2020 Share Posted December 23, 2020 Can't boot into other identical internal ssds or install big sur usb (patch). Keep getting error that the bless tool cannot let me choose a different disk. Have tried the fsck_msdos 0s1, then repair in disk utility - on this forum. Didn't work. Also running radeon rx580 on my mac pro 2012 3.46 Ghz 12-core, so no boot screen when holding down option key to reboot. Any help will be appreciated. This problem didn't occur until Mac OS Catalina. Quote Link to comment Share on other sites More sharing options...
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