Mac sierra bootcamp startup manager6/24/2023 ![]() Something else must be broken on this partition. This means I can't use BootChamp to switch to Windows from the macOS. If I select "EFI Boot" from the Startup Manager, all works fine. But if I select "Bootcamp" (not EFI Boot") in System Preferences/Startup Disk the Mac reboots to a black screen with a message: "no bootable device insert boot disk and press any key". Here's what's happening with the original ATI Mac card.īy holding the option key, I can select either "Macintosh HD", "EFI Boot" or the recovery partition. Funny how Apple "forgot" to patch it to say macOS. Bootcamp drivers work and I am able to restart in "OSX". I was able to install Win 10, all went smoothly. I then had to fix the partition scheme because HS broke some functionality that converts it to a hybrid MBR/GUID partition table. I installed Windows 10 by "patching" the Bootcamp Assistant app. I installed Sierra and then upgraded to High Sierra. I added a Mac Pro 5,1 to the fleet a month ago. All my (modern) Apple devices have been working flawlessly, until now. It's been a while since I posted anything here. If you post the output from the the command shown in step 6, I can update my answer with a better explanation on how to proceed.Īlso, the output, from the command given below, can help diagnose your problem.I know that you can't see the startup manager screen with a non EFI card. Repeat steps 1 through 4, except select icon with label indicating the volume you have currently booted from. If you are using the newer EFI boot method, then the command will produce no output. If you are using a legacy BIOS boot method, then the output should appear similar to what is shown below. bless -info -getBoot -verbose 2>&1 | grep -i legacy Do not restart the computer.Įnter the command given below.
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