Can't delete a volume in Disk Utility.

[anshuvorty]

Hi everyone,

I would like to remove the following volume, called "Untitled" (it used to be a BootCamp partition that I mistakenly used Disk Utility to remove, instead of Bootcamp) and add the storage back to my main APFS container.

How would I do that?

 

[Fishrrman]

It might be possible to do this in terminal, but I don't know the commands.

However,
If nothing else seems to work, I have a 100% guaranteed-to-work procedure:
1. You will need an external drive large enough to hold the Mac partition
2. You will need CarbonCopyCloner, free to download and use for 30 days:

Download CCC - Bombich Software

www.bombich.com

Then...
a. Use CCC to clone the Mac partition to the external drive.
b. Now, BOOT UP from the external drive (hold down the option key at startup until the startup manager appears, select external drive and hit return)
c. Once booted from the external, open disk utility
d. Go to the view menu and choose "show ALL devices"
e. ERASE the internal drive to APFS with GUID partition format
f. Quit disk utility and open CarbonCopyCloner
g. Now, RE-CLONE the contents of the external drive BACK TO the internal drive.

That should do it.
No more bootcamp partition.

 

[anshuvorty]

It might be possible to do this in terminal, but I don't know the commands.

However,
If nothing else seems to work, I have a 100% guaranteed-to-work procedure:
1. You will need an external drive large enough to hold the Mac partition
2. You will need CarbonCopyCloner, free to download and use for 30 days:

Download CCC - Bombich Software

www.bombich.com

Then...
a. Use CCC to clone the Mac partition to the external drive.
b. Now, BOOT UP from the external drive (hold down the option key at startup until the startup manager appears, select external drive and hit return)
c. Once booted from the external, open disk utility
d. Go to the view menu and choose "show ALL devices"
e. ERASE the internal drive to APFS with GUID partition format
f. Quit disk utility and open CarbonCopyCloner
g. Now, RE-CLONE the contents of the external drive BACK TO the internal drive.

That should do it.
No more bootcamp partition.

This solution sounds quite complicated. All I had to do was select the SSD itself (Apple SSD... in the screenshot) > Partition > Delete the partition.

The only downside to this method is that when I hold down the option key to boot, the Bootcamp partition still appears. I contacted Apple Support, and they told me that the only way to remove the Bootcamp partition from appearing in the Boot Menu is to reformat and reinstall macOS Catalina. Insane!

 

[bogdanw]

I contacted Apple Support, and they told me that the only way to remove the Bootcamp partition from appearing in the Boot Menu is to reformat and reinstall macOS Catalina. Insane!

They are just reading scripts Apple provides them, the entry can be removed. Instructions https://www.macobserver.com/tips/quick-tip/macos-removing-windows-efi-boot-entry/
and a related thread https://forums.macrumors.com/threads/i-have-a-phantom-startup-disk.2171955/

 

[Fishrrman]

Once more, I will repeat.
When nothing else works, the procedure I outlined for you (above) WILL work.
100% guaranteed.