Disk Utility stopped repairing Mac HD - Now what?
My computer has been running slow so I cleaned up my desktop, trashed a bunch of old files and went to verify permissions. I was then told to use disk repair.
In the middle of doing so I got this message - "Disk Utility stopped repairing 'Macintosh HD'. Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files."
Besides occasional slowness, my computer is working fine and I was able to get back to my desktop. Is this slow down issue going to get progressively worse if I don't reformat the disk? Should I do what the message says? If so, how? I've never reformatted before...it sounds a little scary.
I back up about once a week (just did so this morning) so I should be good to go there. I have AppleCare. Is this something I should bring the computer in for or can I fix this issue on my own?
Thanks in advance for any help.
MacBook Pro, OS X Mountain Lion (10.8.3), 13-inch, Early 2011