How to erase the internal Macintosh HD
My iMac 27 is taking a long time to start and it takes a long time to operate after I push a key on the keyboard so I went to Disk Utility and Repaired Disk. It showed a bunch of errors and said I need to erase the HD, reinstall Lion OS, and restore backup in Time Machine.
I am unable to erase the Macintosh HD and need instructions on doing this.
Is this a good question?