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boot camp not working after big sur install on 2017 iMac
EFI Boot on the internal disk is Windows. It is a naming issue on Big Sur. Once you boot into Windows, click on the Diamond icon, switch to macOS and then use System Preferences -> Startup Disks to switch to Windows.
EFI Boot on the internal disk is Windows. It is a naming issue on Big Sur. Once you boot into Windows, click on the Diamond icon, switch to macOS and then use System Preferences -> Startup Disks to switch to Windows.
Updated from 10.15.7 to 11.01
When trying to access boot camp/windows I only see Mac OS or EFI Boot
I never had EFI boot before and I do not know what that is.
EFI boot choice will not start Windows but rather it restarts the iMac
Mac Finder does show the Bootcamp partition and all files in it.
I hold the Option key down during boot but I do not see Bootcamp - Windows as an option
I started to continue to hold down the Option key after selecting EFI Boot and Windows eventually starts
It is definitely not working the same as before Big Sur was installed, but it is working.
Something is not right.
I have this issue also but the selection of EFI Boot, after holding Option key, does make Windows boot up after a couple of goes (but unreliable). When I looked up EFI Boot, it is supposed to represent the Time Machine backup drive (which I don't have).
I have found another way to restart to Windows - using the Startup Disk option to get from MacOS to Windows. To get back from Windows just click on Bootcamp icon in system tray and select restart to MacOS. A work around for now...
I have this issue also and I deleted the bootcamp partition. After that I found that it is impossible to install windows again. The problem is that when the windows installation should start from usb after the bootcamp wizard finishes creating the partition the mac restarts and boot, but fails and restarts once again in BigSur. I also tried to press option key when the installer should boot but after manually choosing Windows install it tells me that there is nothing bootable. I reinstalled OS Catalina from scratch and using the same windows installer usb I managed to install a windows on bootcamp. Now the booting is normal in both mac and windows. But if I choose to press option key after chime it shows me EFI BOOT not Windows or Bootcamp, given it starts without problems. Now I will try to make another update to BigSur and see if the problem persists. I'll be back with the results.
Loner T wrote:
EFI Boot on the internal disk is Windows. It is a naming issue on Big Sur.
In Catalina is also called EFI Boot after a clean install of Mac OS and Bootcamp
Once you boot into Windows, click on the Diamond icon, switch to macOS and then use System Preferences -> Startup Disks to switch to Windows.
I will try this after I update to Big Sur again. Thank you!
Can you boot into macOS using Alt/Option?
If the AppleControlPanel.exe does not recognize the Big Sur APFS container because it is older than the Big Sur release, then you will see this issue. If that is the case, Alt/Option is your path forward.
Yes, with Alt/Option i can boot in Mac.
If i choose to boot in Mac OS, from System Preferences, it works without problems, but if i choose to boot in Windows, then windows starts but after two seconds it restarts again and then it works without problems...
Many thanks to Loner T, BigDaveF75 & Cisilvu for their suggestions. I will mark this as solved in a moment as i can now access Windows. Following Big Dave's method is the best for me out of necessity but it is not as elegant as before (no offence intended). I hope this issue its addressed by Apple in an upcoming release. I am surprised that it was not in their release notes.
Again... thank you and stay safe an apart.
See Bootcamp not booting in Big Sur using Mac… - Apple Community for reference.
Please describe your specific issue(s).
This is what it should look like.
Not working...in diamond i can't choose osx boot volume ... it's not there. Windows is running but only after the second restart.
If you hold Alt/Option and reboot, do you see a selection for Windows? If yes, try to select Windows.
Excellent!
boot camp not working in big sur
