William Lloyd wrote:
The combo update is here:
http://support.apple.com/kb/DL1640
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Thanks, I've bookmarked that; but I finally found version 13. I found it because other people on this site have also had the same problem, and their solution was mine. Here's the story: Usually, when I need Disk Utility, I get it as follows: Mac HD>Utilities>Disk Utility. Today I did the same thing, but today I got that errror message. However, after seing other people's experience, I did this: Mac. HD>Applications>Utilities>Disk Utility. It was there, and I used it without any backtalk on the screen. Thanks for your help.