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How to restore Mac OS 10.7.3 from time machine?

2269 Views 10 Replies Latest reply: Feb 8, 2012 9:10 AM by Paul_31 RSS
llou_sfx Level 1 Level 1 (0 points)
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Feb 7, 2012 12:28 AM

Hello I would like to restore my OS to 10.7.2 after the upgrade to 10.7.3.

 

I have time machine, and backups before and after the fatal update.

But I worked between and created files so I do not want to completely restore my system but only the OS / system part.

Is it possible ?

How does it work with Time Machine ?

 

Thank you for your kind help

iMac, Mac OS X (10.7.3)
  • baltwo Level 9 Level 9 (59,255 points)
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    Feb 7, 2012 12:10 PM (in response to llou_sfx)

    See Pondini's TM FAQs for starters.

    27" i7 iMac 10.6.8 , Mac OS X (10.7.3), G4 450 MP 1.5 GB RAM w/(10.5.8/10.4.11/9.2.2)
  • John Galt Level 7 Level 7 (33,235 points)
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    Feb 7, 2012 2:02 PM (in response to baltwo)

    Baltwo, in another thread I asked llou_sfx to post this question regarding this specific topic, which is to restore his previous OS and only the previous OS, without affecting anything else. His intent was to essentially reinstall 10.7.2 which was installed on his system prior to February 1, while retaining all his work subsequent to that date.

     

    I believe he is comfortable with Time Machine in general.

     

    Here is the subject post that brought us both to this juncture:

     

    https://discussions.apple.com/message/17523168#17523168

     

    I can find nothing specific in James's FAQ regarding exclusive restoration of a previously installed OS, nor anything specific in any KB article, nor any relevant discussion threads. I am working on the assumption this is possible.

     

    The easy solution is to simply reinstall his entire system as it existed prior to the 10.7.3 update on February 1, followed by restoring the individual documents modified since then, but I'd like to know if it is possible to simply restore a previously installed OS version in one step.

     

    If you (or Pondini) know how to accomplish that I would certainly appreciate it.

     

    Many thanks!

     

    (llou_sfx: please pardon me for asking on your behalf... posting a new topic worked, since I was hoping Baltwo or Pondini would respond.)

  • baltwo Level 9 Level 9 (59,255 points)
    Currently Being Moderated
    Feb 7, 2012 3:06 PM (in response to John Galt)

    Thanks for providing the salient details. I defer all TM issues to Pondini, since I don't use it, preferring to rely on bootable backups/clones made with CCC. I also retain the Lion updaters that I beta-tested, 7.0, 7.2, and 7.3, which allow me to reinstall any version w/o being limited to what apple's posted onto their servers (namely only 10.7.3) if one wants to reinstall or use the crappy Recovery HD method. Rather than mucking with TM, I recommend DLing the OS X Lion Update 10.7.2 Client Combo and installing it. That does the same thing, w/o relying on the Internet or TM.

    27" i7 iMac 10.6.8 , Mac OS X (10.7.3), G4 450 MP 1.5 GB RAM w/(10.5.8/10.4.11/9.2.2)
  • baltwo Level 9 Level 9 (59,255 points)
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    Feb 7, 2012 3:22 PM (in response to llou_sfx)

    llou_sfx wrote:

    I decided to backup my documents with time machine and to scratch my OS.

    radical solution, but clean method I think.

    IMO, a waste of time, bandwidth, and electricity. I again suggest trying the 7.2 COMBO update. As for any WiFi issue, I don't use it, so can't address it.

    27" i7 iMac 10.6.8 , Mac OS X (10.7.3), G4 450 MP 1.5 GB RAM w/(10.5.8/10.4.11/9.2.2)
  • John Galt Level 7 Level 7 (33,235 points)
    Currently Being Moderated
    Feb 7, 2012 4:20 PM (in response to baltwo)

    Baltwo, I was 99% certain that one cannot install a previous OS update over a superseding version, so I tried it:

     

    Screen Shot 2012-02-07 at 7.07.59 PM.png

     

    Now I'm 100% certain. I believe the only way to "downgrade" is to use TM as llou_sfx did, unless one had a retail Lion USB stick and I'm not even sure about that.

     

    Is there something I'm missing?

  • John Galt Level 7 Level 7 (33,235 points)
    Currently Being Moderated
    Feb 7, 2012 4:30 PM (in response to llou_sfx)

    I decided to backup my documents with time machine and to scratch my OS.

    radical solution, but clean method I think.

    Radical yes, but this method will certainly wipe the slate clean.

     

    I have done it myself several times, attempting to diagnose the Wi-Fi issue. TM is a blessing.

     

    I suggest you try 10.7.2 for several days, and if you have the patience, try the 10.7.3 update again. If the problem recurs you will have become an expert with "downgrading" since you will have to do that all over again, unless you want to wait for another update.

     

    Who knows, maybe 10.7.4 will fix it for you and break it for me

  • baltwo Level 9 Level 9 (59,255 points)
    Currently Being Moderated
    Feb 7, 2012 4:41 PM (in response to John Galt)

    Then, I was mistaken, but haven't tried it. All I can suggest is to use an earlier installer rather than the COMBO.

    27" i7 iMac 10.6.8 , Mac OS X (10.7.3), G4 450 MP 1.5 GB RAM w/(10.5.8/10.4.11/9.2.2)
  • Paul_31 Level 6 Level 6 (12,230 points)
    Currently Being Moderated
    Feb 8, 2012 9:10 AM (in response to llou_sfx)

    There are some permissions that never get fixed. Here's a list of those that can safely be ignored:

    http://support.apple.com/kb/TS1448?viewlocale=en_US&locale=en_US

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