Hi there, I experience a lot of trouble when wanting to free the space previously taken by allocating it to Windows Boot Camp.
Now, I cannot erase/restore/first-aid this disk. The main problem seems to be that it can't be opened.
I guess I have done something wrong (I suspect it is caused because I deleted the ISO windows file before erasing the disk (hence it is no longer listed as BOOTCAMP but as disk0s3? [just a wild guess!]).
Anyways, is there anyone out there 1) that can help me ask the right questions in order to 2) hopefully solve the problem?
diskutil list
and post the output to your question.