?How to downgrade from 10.11

Discussion in 'OS X Yosemite (10.10)' started by xxjrsmith3xx, Jun 12, 2015.

  1. xxjrsmith3xx macrumors member

    xxjrsmith3xx

    Joined:
    Oct 26, 2014
    Location:
    NYC
    #1
    So i installed 10.11 but i would like to know how would i be able to downgrade back down to 10.10.3 ?? Thanks!
     
  2. aristobrat macrumors G4

    Joined:
    Oct 14, 2005
    #2
    You restore from the backup you took before you upgraded. There is no "downgrade" option.
     
  3. xxjrsmith3xx thread starter macrumors member

    xxjrsmith3xx

    Joined:
    Oct 26, 2014
    Location:
    NYC
    #3
    I didn't back up...? I flashed one of my usb to a 10.11 install usb and then did a fresh install of 10.11
     
  4. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #4
    10.11 is a beta test, and beta system software will always recommend that you have a full backup before you upgrade,so if things go wrong for you (it's a test system, remember?) - -
    Boot to your recovery system. Erase the drive, and restore from your backup. The process may be somewhat different, depending on which process you used for your backup.
    Bet these steps will be the same when the beta is released to the public
     
  5. xxjrsmith3xx thread starter macrumors member

    xxjrsmith3xx

    Joined:
    Oct 26, 2014
    Location:
    NYC
    #5
    I never back up my old 10.10.3
     
  6. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #6
    Fresh install (to me) means that you erased the drive, and installed your new system.
    And, i infer from that, that you don't have anything important on the new system.
    So, if you have the installer from the previous system (Yosemite 10.10), just boot to that installer, and erase, install, etc. for the old system. You can also boot to Apple's internet recovery system.
    Restart, while holding Option+Command+R. It's booting from Apple's servers, so may take several minutes to boot. Run Disk Utility from the menu to erase your hard drive. Then, reinstall OS X. The servers should offer you the system that your Mac shipped with, maybe a newer version, but it WON'T be 10.11.
    Let that system reinstall, then go on with your life.
     
  7. xxjrsmith3xx thread starter macrumors member

    xxjrsmith3xx

    Joined:
    Oct 26, 2014
    Location:
    NYC
    #7
    I just got a apple.com/support -2003f ... i did Option+Command+R
     
  8. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #8
    I don't find good info about some of the error codes, but the error 2003F appears to be related to problems with your network connection.
    There are a few items that you should be sure about.
    You need a WPA or WPA2 security level on your wireless, WEP won't work. Wireless network with no password security also won't work.
    You can't connect to the servers if you use a proxy server.
    Some wireless routers with custom firmware, such as DD-WRT, may not allow connection to Apple's servers.

    Best choice is to use a wired/ethernet connection, as that will eliminate any problems that might be caused by your wireless network.
    Be sure to try both SMC and PRAM resets just prior to your attempt to connect to Internet Recovery.
     
  9. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #9
    Well that was foolish. You should keep regular backups in any case to cover you for the many kinds of failure. As said 10.11 is Beta software which clearly you aren't in a position to be using, it isn't just a way of getting the latest shiny thing.

    If your systems is a dedicated test system you can blow away on demand then do just that.
     
  10. cybersaint48 macrumors newbie

    Joined:
    Jun 25, 2015
    #10
    Really stumped here. I have osx 10.11 on my Retina imac and, i do have backups however i have tried everything booted off yosemite usb disk, internet recovery which seems to work then just hangs, Tried the Pram reset, tried to restore a time machine backup, no matter what i try it wont allow me to erase partition or drive.

    Any suggestions greatly appreciated

    Cheers
     
  11. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #11
    What happens when you try and erase the drive when booted from the Yosemite USB key?

    It may be that the install converted your drive to a core storage volume. Run the command below in Terminal and tell us what it says.

    Code:
    diskutil list
     
  12. cybersaint48 macrumors newbie

    Joined:
    Jun 25, 2015
    #12
     
  13. cybersaint48 macrumors newbie

    Joined:
    Jun 25, 2015
    #13
    Your absolutely Correct it did that and i was really lucky i installed Yosemite on my partition and then booted off a external usb drive and was able to "unmount" the drive .. Whew ..

    Joy Joy what a good earning experience. Thank you !
     

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