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HT1444: Software update, upgrade--what's the difference?

Learn about Software update, upgrade--what's the difference?

HT1444 Software upgrade

352 Views 5 Replies Latest reply: Apr 6, 2013 12:33 PM by abird03 RSS
abird03 Calculating status...
Currently Being Moderated
Mar 14, 2013 8:54 AM

I'm trying to upgrade my software from 10.6.8 to mountain lion, but it keeps saying "an unknown error has occurred" when I attempt to sign in with my apple ID. What's happening?

MacBook Air (11-inch Late 2010), Mac OS X (10.6.8)
  • a brody Level 9 Level 9 (62,060 points)
    Currently Being Moderated
    Mar 14, 2013 11:40 AM (in response to abird03)

    Is your data backed up? How big is your hard drive?


    How full is it? 

    Have you checked compatibility listings on for 10.7 and 10.8?

  • a brody Level 9 Level 9 (62,060 points)
    Currently Being Moderated
    Mar 14, 2013 11:41 AM (in response to abird03)

    10.8 by the way is not a free update, and must be done through the App Store.

  • a brody Level 9 Level 9 (62,060 points)
    Currently Being Moderated
    Apr 6, 2013 10:22 AM (in response to abird03)

    Are you sure it is a 4 GB hard drive?  Or do you have 4 GB of RAM?   Those are totally different things.  Once is chip memory, the other is platter memory.    The RAM in Apple menu -> About this Mac is chip memory.    The Macintosh HD when you open it tells you in the status bar of the window how much hard drive space remains.


    If you have just 4 GB of hard disk space left, that's your problem.  You need to free up at least 15% of your hard drive and ideally 8 GB of hard drive space on top of that.  If you hit the command key when selecting the Macintosh HD title, and then use the menu to select "name's Computer" (your name you registered the computer will be in the name) that will let you get the info on the hard drive.   Go then to View menu -> View Options, and check off, show item info.  This will give you your actual hard drive size and how much space is free.


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