Sierra 10.12.5 need a little help

Discussion in 'macOS Sierra (10.12)' started by Tim in Scottsdale, Oct 4, 2017.

  1. Tim in Scottsdale macrumors member

    Joined:
    Mar 13, 2016
    Location:
    Scottsdale Arizona
    #1
    Guys

    I have an iMac with 10.12.4 and I like it. I acquired a used iMac yesterday with 10.12.5 and I hate it.

    How do I revert to 10.12.4 on that machine?I'm not a geek so step me thru it like a beginner LOL
     
  2. redheeler macrumors 604

    redheeler

    Joined:
    Oct 17, 2014
    #2
    I don't think going from 10.12.4 to 10.12.5 will cause a noticeable slowdown, and likewise I can't think of a reason why you shouldn't update both to 10.12.6. These are very minor updates that typically don't have a negative impact on performance, and include patches for security vulnerabilities, bug fixes.

    Is there a difference between the two iMacs in terms of specifications or age?
     
  3. Tim in Scottsdale thread starter macrumors member

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    Mar 13, 2016
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    Scottsdale Arizona
    #3
    Hello

    I don't like the changes in 10.12.5 so if those carried to 10.12.6 I will hate that also.

    Can someone just answer my question without veering off?
     
  4. redheeler macrumors 604

    redheeler

    Joined:
    Oct 17, 2014
    #4
    Do you still have a copy of the 10.12.4 installer?
     
  5. Tim in Scottsdale thread starter macrumors member

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  6. redheeler macrumors 604

    redheeler

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    Oct 17, 2014
    #6
    Then, since Apple is no longer offering the 10.12.4 installer, the only way I can think of would be to erase the iMac running 10.12.5 and clone your 10.12.4 iMac's install over to it.

    You can use Target Disk Mode to accomplish this, or an intermediate external hard drive. Boot the 10.12.5 iMac into Recovery, click Disk Utility under the Utilities menu, select the 10.12.5 iMac's internal drive in the sidebar, click Restore under the Edit menu, select your 10.12.4 iMac's OS next to "Restore from" and hit Restore.
     
  7. Tim in Scottsdale thread starter macrumors member

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  8. Tim in Scottsdale thread starter macrumors member

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    #8
    Okay

    Can someone step me through how to take 10.12.4 off my good iMac; burn it to disc for example? Or does the installer have things on it that my machine does not have?
     
  9. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #9
    "Can someone step me through how to take 10.12.4 off my good iMac; burn it to disc for example? Or does the installer have things on it that my machine does not have?"

    You will need an external drive of sufficient capacity.
    You will need either CarbonCopyCloner or SuperDuper.
    Both of these are FREE to download and use for the first 30 days -- long enough to do what you need.

    Connect the external drive to the iMac.
    Open Disk Utility and erase it, to HFS+ with journaling enabled.
    Now, launch CCC.
    Put your source drive (iMac internal drive) on the left in CCC's window.
    Put your target (external drive) to the right of the source drive.
    You can accept CCC's defaults for this clone.
    Then... let 'er go.

    CCC will ask if you wish to clone the recovery partition, I'd suggest that you do this too.

    Take the cloned backup to the "new" iMac and connect it.
    Boot the iMac, but hold down the option key and KEEP HOLDING IT DOWN until the startup manager appears.
    Select the external drive with the pointer and hit ok
    The [new] iMac should now boot from the external drive.
    When you get to the finder, go to "about this mac" (Apple menu) and verify that you are booted from the clone (it should look just like your OLD iMac).

    Now you can do this:
    Use Disk Utility to ERASE the contents of the internal drive on the new iMac, then...
    Launch CCC again, and RE-CLONE the contents of the backup drive to the internal drive on the new iMac.
    When done, you should be able to boot the new iMac.
    Again, reboot with the option key held down for the startup manager.
    Select the internal drive and hit return.
    It will boot and look exactly like the old one.
    TIP: Open system preferences, go to "startup disk", and set the internal drive as the boot volume (this is required because you replaced the contents of the internal drive).

    WARNING!
    This will erase anything that is currently on the new iMac's internal drive, so you have to save anything you want from it BEFORE you do the above procedure.

    Print out these instructions for reference.
     
  10. Tim in Scottsdale thread starter macrumors member

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  11. Tim in Scottsdale thread starter macrumors member

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    #11
    Guys

    In Sierra 10.12.5, I am not finding the Hard Drive icon; is it hidden? Where?
     
  12. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #12
    "In Sierra 10.12.5, I am not finding the Hard Drive icon; is it hidden? Where?"

    Go to the finder, open finder preferences, check the "checkboxes".
     
  13. Tim in Scottsdale thread starter macrumors member

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    Mar 13, 2016
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12 October 4, 2017