ewt

Q: Down grade 10.7 to 10.6, Down grade 10.7 to 10.6

Hi guys

 

when i install 10.7 to my mac air the fan kicks in all the time so i have decided to

go back to 10.6.

 

I have restart and hold c (10.6 cd in the external cd rom) went to disk utility and erase the hard drive

 

I then restart again, it started installation and ask to select the language, after selecting, the error comes up

”this mac os cannot be installed in this computer”

 

can someone please help me out

 

thanks heaps

Posted on Aug 25, 2013 4:04 PM

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Q: Down grade 10.7 to 10.6, Down grade 10.7 to 10.6

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  • by babowa,

    babowa babowa Aug 25, 2013 5:59 PM in response to ewt
    Level 7 (31,893 points)
    iPad
    Aug 25, 2013 5:59 PM in response to ewt

    So, you booted from the Snow Leopard DVD? And then used Disk Utility from the DVD to erase the drive? Then tried to reinstall the OS?

     

    Did your Mac come with Snow Leopard preinstalled?

  • by ewt ,

    ewt ewt Aug 26, 2013 12:56 AM in response to babowa
    Level 1 (0 points)
    Aug 26, 2013 12:56 AM in response to babowa

    I just tried that on my IMAC and it did the same thing, except this time I didn't erase HDD in IMAC

     

    Both computer come with 10.5. about a year later I upgrade both to 10.6 and both were working fine.

     

    Now for some reason, both computer say mac os cannot be installed on this computer.

     

    So what should I do next??

  • by Eau Rouge,

    Eau Rouge Eau Rouge Aug 26, 2013 3:09 AM in response to ewt
    Level 4 (2,754 points)
    Mac App Store
    Aug 26, 2013 3:09 AM in response to ewt

    The 10.6 disc is looking for a previous version of Mac OSX 10, either 10.5 (any version) or OSX 10.4.11

    if the 10.6 installer does not find a earlier version of Mac OSX 10 as mentioned above, it will not install 10.6

    so go back to your original 10.5 install disc(s) install that then install 10.6 again over that (don't erase), hopefully that will sort your problem.

     

    you could try this link for more information

     

    http://www.macworld.com/article/1142454/install_snow_leopard.html

     

    Hope it goes well

  • by ewt ,

    ewt ewt Aug 26, 2013 5:03 AM in response to Eau Rouge
    Level 1 (0 points)
    Aug 26, 2013 5:03 AM in response to Eau Rouge

    Thank You Eau Rogue,

     

    The IMAC I have is currently on 10.5.8 which is the latest for 10.5 version,

    but It still giving me the same error too >>_<<

  • by ewt ,

    ewt ewt Aug 26, 2013 5:08 AM in response to Eau Rouge
    Level 1 (0 points)
    Aug 26, 2013 5:08 AM in response to Eau Rouge

    This is the Error

     

     

    Message was edited by: ewt

  • by Lanny,

    Lanny Lanny Aug 26, 2013 6:31 PM in response to Eau Rouge
    Level 5 (7,900 points)
    Desktops
    Aug 26, 2013 6:31 PM in response to Eau Rouge

    The 10.6 disc is looking for a previous version of Mac OSX 10, either 10.5 (any version) or OSX 10.4.11

    if the 10.6 installer does not find a earlier version of Mac OSX 10 as mentioned above, it will not install 10.6

    so go back to your original 10.5 install disc(s) install that then install 10.6 again over that (don't erase), hopefully that will sort your problem.

     

    None of this is true. You don't need to have anything installed on the disc prior to installation.

     

    You do have to use a commercial release of SL, not a Grey set of DVDs from another Mac that shipped with SL.

  • by Eau Rouge,

    Eau Rouge Eau Rouge Aug 26, 2013 11:37 PM in response to ewt
    Level 4 (2,754 points)
    Mac App Store
    Aug 26, 2013 11:37 PM in response to ewt

    Hi ewt

     

    looks like I did give you erroneous advice regarding Snow Leopard looking for a previous OS, so sorry about that.

    If you have the commercial release of SL it should install. If you can boot from the install disk and go to disk utility make sure the disk is partitioned to GUID partition scheme. And also the format is Mac OS Extended (Journaled).

     

    This link may make things clearer.

     

    http://support.apple.com/kb/TS1600

     

    just out of interest are you able to install the older OS 10.5 ?