Currently Being ModeratedAug 23, 2013 11:38 AM (in response to Nc278)
it sounds like the mac keeps booting to recovery partition.
do you have backup of your data? if you do i would recommend opening that disk utility again and choosing the mac HD from the left side
go to the erase tab and make sure it's in mac OS extended journaled format then click on Erase button
close the disk utility window and do a clean install of the OS by following the prompts.
you should then be able to restart and go through the setup assistant
Currently Being ModeratedAug 23, 2013 12:08 PM (in response to Nc278)
while in the disk utility window on the left side select the main mac HD and then along the top there are different options one of them should be unmount, click that and then try again to erase the drive.