Hi there, I have a 2013 macbook pro and need to reinstall (drive filled with ‘system stuff??)
but each time I go to disk utility I get - the erase button is light grey (so I can't select it) and it says "This operation can not be performed because you can not unmount the volume you are booted from." Does anyone have any ideas of what I should do? Thanks, John
Hi,
You need to boot from Recovery Mode to unmount root drive.
Use macOS Recovery on an Intel-based Mac - Apple Support
Hi,
You need to boot from Recovery Mode to unmount root drive.
Use macOS Recovery on an Intel-based Mac - Apple Support
Thank you for your reply, have given it a go but now everything seems to have disappeared, all that shows is a wirless request which I can’t seem to click on for it to register - I keep clicking on it but norhing happens, try again …
Cannot unmount volume?
