DP3 has locked me out of my MacBook, be careful!

Discussion in 'macOS Sierra (10.12)' started by kyemaloy, Jul 18, 2016.

  1. kyemaloy macrumors member

    Jul 6, 2015
    Mac starts up, chime sounds, login screen opens. I click my account picture and enter the 100% correct password. The screen goes black leaving just the mouse on the screen, and the password screen pops back up. Repeats no matter how many times I try and is persistent after a reboot.

    Reported to apple, with a video attached but just want to warn people to remember that beta software can do this and to keep everything backed up, as I know some people have important stuff on their computers and don't backup!
  2. 0014 macrumors 6502a

    May 23, 2016
    Middle East
    Had the same issue tonight. Solution for those who don't read the link above is to boot into recovery (CMD R) and then select reinstall OS. This keeps all files intact.

    What isn't mentioned is that you must be connected to the internet or it won't install as it verifies the eligibility of the machine with 
  3. bbfc macrumors 68030


    Oct 22, 2011
    Newcastle Great Park, England.
    I tried that and it asked me to sign in to my Apple ID during the installation to download the installer, but kept saying the item was temporarily unavailable. Booting in to safe mode and then restarting seems to have worked, though my mac seems incredibly slow.
  4. Supertaff macrumors member

    May 20, 2014
    Has happened to me as well on MacBook 12 inch. Dp1 installed with fine and worked. After dp3 install boots up to log in screen then won't accept my password keeps going back to login.

    Have tried a few things including internet recovery which hasn't worked.

    Have given up for this evening and will try again tomorrow

    If anyone has any other fixes / suggestions let me know. Thought dp3 would be more stable
  5. retrospek macrumors 6502a


    Sep 28, 2004
    I had the same issue - every time I would select my logon name and enter my password the screen would go blank for a second and then return back to the logon screen.

    Only way I fixed it was to click on the 'Guest' account instead - which did work and then I went to the Users/Groups System Preference and set-up a new user. When I then logon as a new user it works.
  6. Supertaff macrumors member

    May 20, 2014
    wasn't able to get the Guest account to work either as it produces a crash report with shut down, crash and restart as old options.

    So, I've taken the nuclear option, reformat of whole drive and then reinstall El Cap.

    I'm lucky all my files are stored up in the cloud, so no major issues for me, but hope everyone else who has problems has backups or cloud storage of their data if they need to reformat.
  7. 0014 macrumors 6502a

    May 23, 2016
    Middle East
    The guest account crashed for me too.

    But the reinstall OS worked and it's now on DP2.

    Think I'll leave it there and wait for DP4. Surprised that  haven't pulled it.
  8. Supertaff macrumors member

    May 20, 2014
    glad you're up and running again. I'm going to leave until DP4 before I have another go at installing Sierra, I have DP1 running on a separate partition on my iMac so can still play with it should I wish, but leaving my MacBook for the time being, was hoping DP3 could have been a daily driver.

    Presume Apple haven't had enough of these failures to justify pulling it yet, maybe there's something specific about a small number of computers or maybe the install itself is causing issues for some people.

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