Repair Your Hard Disk in Single User Mode

Disk Utility is unable to repair your internal drive if your Mac is currently booted from that drive. MacOS has an alternate way to diagnose and repair your internal drive. Here’s how. Start up or restart your Mac. As soon as you turn it on, begin holding...

Safe Booting your Mac

This article is adapted from an Apple knowledge base article at http://support.apple.com/kb/HT1564?viewlocale=en_US&locale=en_US Starting up in Safe Mode does several things: It forces a check of the startup volume, just like the First Aid feature of Disk Utility....