In Terminal, you can use
diskutil unmountDisk force disk0
diskutil eraseDisk jhfs+ "Macintosh HD" disk0
and try. The use of 'force' can be dangerous, but since we are erasing the whole drive anyway, it should be fine.
Macs-iMac:~ mac$ diskutil mergePartitions jhfs+ "Macintosh HD" disk0s2 disk0s3
Merging partitions into a new partition
Start partition: disk0s2 Macintosh HD
Finish partition: disk0s3 REC
Started partitioning on disk0
Merging partitions
Waiting for partitions to activate
Growing disk
Finished partitioning on disk0
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 499.8 GB disk0s2
Macs-iMac:~ mac$
From macOS Terminal, post the text output (easier to copy/paste) of
diskutil list
diskutil cs list
The correct syntax is
diskutil eraseDisk jhfs+ "Macintosh HD" disk0
Run
diskutil eraseVolume jhfs+ "REC" disk0s3
and post the output.
It is already fixed, you can re-install macOS now. Check the size in Disk Utility.
Ok i will check. Now I got solved the issues and next time if I want to erase disk as to fresh start. which it will be? Do I have to make a forum for installing boot camp or continue posts on here?
iMac Capacity
