What should I do if I can’t switch back to the mac system?
I own a 2017 macpro and have installed window 10 once before using bootcamp. After the installation, I can use it on both systems.
At the front end, I felt that the window system was no longer usable, so I used bootcamp to erase the window 10 system.
I had nothing to do today and wanted to play a certain game under window, so I installed window 10 again.
After installing, I found that I couldn’t switch back to the mac system! The restart option does not have the mac os option, but directly enters the window system.
Solution:
1: After shutting down, press the power button option command r (it is best to hold down the key combination first and then press power on, but sometimes it doesn’t work) to enter the online page (With map reading bar)
2: After entering the online page, select Disk Utility, you can see that there are two storage volumes, mac oc and bootcamp. (If you can’t see mac os, it means that your mac os has been erased when you installed the window system.)
3: Select the mac oc volume and click First Aid. After the first aid is completed, restart the computer. , if you can enter mac os, it means the repair is successful.
4: If you still enter the window system after restarting or shutting down and pressing option after restarting does not show up to select the startup disk, please repeat steps 1 and 2. Then select the bootmap volume to erase, and select the format as APFS (mac os high sierra) (this operation will erase the entire window system. If there are important files in the window system, back them up to a USB disk or cloud disk first)
-- Steps 5, 6, and 7 are to return the disk space allocated to window to mac os. If your disk space is large and you don’t care about the space allocated to window, you can ignore it
5: There will be a display icon in the upper left corner of Disk Utility, click it and select Show all devices. Select the parent directory of bootcamp and click the remove icon on the right side of the volume.
6: Select the parent of mac os and then select the partition. You will see that there are two volumes: bootcamp and mac os. After clicking bootcamp, click the minus sign below and select apfs as the format. After success, the disk space allocated to the window will be returned to the mac os volume.
7: mac os will work normally after restarting.
This article is for reference only and we are not responsible for the consequences
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