Hi all, Just needed to vent while sitting waiting for Mavericks to reinstall. I ran the security update and everything seemed to be going fine, it rebooted to the grey screen with a progress bar. After the bar is filled about 5% it moves on to the spinning gear, then turns off! I try turning it on a few times and the same thing happens again and again. I open up the repair partition and disk utility says the drive can't be repaired! I have to wipe it and reinstall. I'm still waiting for it to download, 1h25m to go. GRRRR! I only just posted on another thread how well mavericks is working too!