Returning to High Sierra from Win 10/Bootcamp Issue

[swandy]

I am running the latest version of Mac OS High Sierra and a fully updated version of Windows 10 under Bootcamp.

When I want to go from Mac to Windows, I click the Apple logo, select Restart, wait for the chime, hold Option and select Windows. No problems.

But when I want to go back to Mac OS, I do the same thing - Windows Logo, click on Power, click on Restart, wait for the chime, hold Option and select Mac OS. But it never finishes the startup for High Sierra. No error, just the status bar gets stuck - even waited over an hour and a half yesterday before holding the POWER button.

However, if I do a complete shutdown when on the Windows 10 side and then use the Power button to restart the iMac, everything goes fine.

I have read the support article about High Sierra and Bootcamp/Windows, but since I am not using the icon in the system tray in Windows, that does not/should not apply to me.

Any suggestions?

Thanks.

 

[ncrypt]

When you hear the chime, press cmd+R to enter macOS recovery. Open Disk Utility and repair your Macintosh HD partition. That can sometimes fix boot issues.

 

[w1z]

Sounds like your iMac's nvram might be corrupted.

Carry out a PRAM reset, boot into High Sierra, go into System Preferences, Startup, select your HS installation disk then close Preferences.. Don't restart.

Go back again into System Preferences, Startup and select your Windows/Bootcamp disk/partition and then close it.. Again don't restart.

If Windows is your default OS, shutdown your iMac and proceed to test normally.

If MacOS is your default OS, go back into System Preferences, select your MacOS drive and shutdown. Proceed to test normally

Edit: I have Bootcamp 6 app and select drivers installed and running great in Windows 10 without any issue on a Mac Pro 3,1

 

[sylvie.petit]

This problem is happening because windows can't recognize the partition with high sierra on it. Unfortunately, windows can’t recognize a partition with APFS file system on it. You can still select windows from the startup disk options in system preferences from macOS, but you'll have to use the hold option method to move back to mac from the windows. I hope this will help you.

 

[h9826790]

This problem is happening because windows can't recognize the partition with high sierra on it. Unfortunately, windows can’t recognize a partition with APFS file system on it. You can still select windows from the startup disk options in system preferences from macOS, but you'll have to use the hold option method to move back to mac from the windows. I hope this will help you.

OP is already using the start up manager to select boot partition. His problem is MacOS can only boot to desktop on a "cold boot", but not "warm restart" after using Windows.

 

[swandy]

Sounds like your iMac's nvram might be corrupted.

Carry out a PRAM reset, boot into High Sierra, go into System Preferences, Startup, select your HS installation disk then close Preferences.. Don't restart.

Go back again into System Preferences, Startup and select your Windows/Bootcamp disk/partition and then close it.. Again don't restart.

If Windows is your default OS, shutdown your iMac and proceed to test normally.

If MacOS is your default OS, go back into System Preferences, select your MacOS drive and shutdown. Proceed to test normally

Edit: I have Bootcamp 6 app and select drivers installed and running great in Windows 10 without any issue on a Mac Pro 3,1

Want to thank you for these instructions. Seems to have resolved the issue - at least for now.