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  1. #1
    preparing to sell MAC27 ... lost my OS disk

    Member Since
    Mar 15, 2010
    Location
    NH
    Posts
    69
    Your Mac's Specs
    iMAC 27" 2.66GHz i5 1TB HDD 12GRAM
    preparing to sell MAC27 ... lost my OS disk
    I'm prepping my older MAC27 to sell and will be scrubbing and reformatting the drive.
    I will need to re-install a fresh copy of the OS afterwards but, I lost my OS discs.

    What's the best way proceed?
    Can I download it somehow after scrubbing the disk?

    Rob
    27" iMAC i5, 12G RAM
    1TB HDD

  2. #2
    preparing to sell MAC27 ... lost my OS disk
    Slydude's Avatar
    Member Since
    Nov 16, 2009
    Location
    North Louisiana, USA
    Posts
    13,410
    Your Mac's Specs
    2.8 GHz 2008 MacBook Pro 10.11, 8 GB mem, iPhone XS, 2015 iMac 16 GB 10.14.1 beta
    What OS version are you trying to reinstall?

  3. #3
    preparing to sell MAC27 ... lost my OS disk

    Member Since
    Mar 15, 2010
    Location
    NH
    Posts
    69
    Your Mac's Specs
    iMAC 27" 2.66GHz i5 1TB HDD 12GRAM
    It is a late 2009 Mac27.
    12GB RAM
    1TB HDD

    It is currently running Sierra V10.12.6
    I believe this is the latest version that will support this machine.
    Anything earlier would be fine as well.
    I will sell it soon and the new user can upgrade the OS if he wishes.
    27" iMAC i5, 12G RAM
    1TB HDD

  4. #4
    preparing to sell MAC27 ... lost my OS disk
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    39,818
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Any OS you're going to want to install to sell this computer with is downloadable...no OS disks needed.

    - Nick

    p.s. If this is definitely a Late 2009 27" iMac...it can run High Sierra.
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  5. #5
    preparing to sell MAC27 ... lost my OS disk
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    4,945
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  6. #6
    preparing to sell MAC27 ... lost my OS disk

    Member Since
    Mar 15, 2010
    Location
    NH
    Posts
    69
    Your Mac's Specs
    iMAC 27" 2.66GHz i5 1TB HDD 12GRAM
    Won't it brain-dead after I reformat the HD, getting in the way of web access?
    27" iMAC i5, 12G RAM
    1TB HDD

  7. #7
    preparing to sell MAC27 ... lost my OS disk
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    4,945
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    Only if you wiper the drive. But, you could create a bootable USB installer, https://support.apple.com/en-us/HT201372, and use that to install whatever macOS version you out on it. This way, when you boot from the USB, you can use Disk Utility to erase the internal drive, and then set it up as a brand new fresh clean macOS install.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  8. #8
    preparing to sell MAC27 ... lost my OS disk
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    39,818
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by albireo13 View Post
    Won't it brain-dead after I reformat the HD, getting in the way of web access?
    If this computer was or is running any sort of more modern version of the macOS...then the HD has a Recovery Partition on the drive...which would not be erased with a regular "erase the HD action.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #9
    preparing to sell MAC27 ... lost my OS disk

    Member Since
    Mar 15, 2010
    Location
    NH
    Posts
    69
    Your Mac's Specs
    iMAC 27" 2.66GHz i5 1TB HDD 12GRAM
    so, the recovery partition is preserved during a HD reformat??
    27" iMAC i5, 12G RAM
    1TB HDD

  10. #10
    preparing to sell MAC27 ... lost my OS disk
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    4,945
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    Quote Originally Posted by albireo13 View Post
    so, the recovery partition is preserved during a HD reformat??
    Yes, when accessing Disk Utility from the recovery partition.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  11. #11
    preparing to sell MAC27 ... lost my OS disk
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    39,818
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by albireo13 View Post
    so, the recovery partition is preserved during a HD reformat??
    Exactly as member ferrarr mentioned. If you access Disk Utility via the Recovery Partition...and select "Erase Disk"...only the main partition of the HD is erased. The Recovery Partition is untouched...and the Recovery Partition only contains generic-stock Apple stuff (nothing personal is stored there)....thus the Recovery Partition itself does not need to be erased.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  12. #12
    preparing to sell MAC27 ... lost my OS disk

    Member Since
    Mar 15, 2010
    Location
    NH
    Posts
    69
    Your Mac's Specs
    iMAC 27" 2.66GHz i5 1TB HDD 12GRAM
    That worked great! Thanks a bunch.
    The only glitch was during re-install my wireless keyboard was not recognized so I had to run out to the store and buy a cheap USB keyboard to complete the OS restore.
    Now running Sierra and looking good.
    : )
    27" iMAC i5, 12G RAM
    1TB HDD

  13. #13
    preparing to sell MAC27 ... lost my OS disk
    Slydude's Avatar
    Member Since
    Nov 16, 2009
    Location
    North Louisiana, USA
    Posts
    13,410
    Your Mac's Specs
    2.8 GHz 2008 MacBook Pro 10.11, 8 GB mem, iPhone XS, 2015 iMac 16 GB 10.14.1 beta
    It's always good to have a wired keyboard on hand for just this situation Even the Apple wireless keyboard does not always work when you try to use the Option key to select the boot drive.
    Last edited by Slydude; 10-14-2018 at 01:35 PM. Reason: Corrected typo

  14. #14
    preparing to sell MAC27 ... lost my OS disk
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    39,818
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by albireo13 View Post
    That worked great! Thanks a bunch.

    Now running Sierra and looking good.
    Excellent & congrats!

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

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