After upgrade to 10.12.2 macbook pro has black screen

I've had this issue for over a month and, to make a very long story short, was on with apple support again today and guess what solved it? ENTER YOUR PASSWORD AGAIN.

That's it. I couldn't believe it.

They had me restart, which I did, and as soon a I entered my profile credentials my screen went black. He told me to enter my password again and it bloody worked.

And just a few minutes ago I woke it up from sleep. Guess what? black screen. I didn't panic, typed my password and it came to life.

This is an issue that they have now acknowledged that seems to be random with Sierra 10.12.2.

Hope this can work for you as well.

Mark

The solution is not always a plist file. Nor the creation of a new account. Nor any solution offered so far here.

As mentioned in a previous reply in this thread, one difference I'm experiencing (or not hearing about from others) is that (a) the Mac in question is set to wireless turned off by default and (b) once I reach the Black Screen Of Impasse (BSOI) 😉, unplugging the Ethernet cable allows my machine to continue: Upon immediately unplugging, the Apple logo and a progress bar appear, and I can immediately replug the Ethernet and continue... until the next time I power cycle the machine, at which point I once again have to unplug and replug the Ethernet.

During a three-hour Apple Support chat, before the techs gave up, we tried (with lots of Ethernet unplugging and replugging to get through the steps):

• a System Management Controller (SMC) reset:
  Shift-Control-Option and Power
  
• Safe mode:
  Power the Mac back on, immediately after hearing the startup chime, press and hold the Shift key and release it when you see the Apple logo
• three times the remove (well, technically, rename) plist file:
  Boot to single user with Command-S and Power
  mount -uw /
  cd /Library/Preferences
  mv com.apple.loginwindow.plist com.apple.loginwindow.plist.old
  reboot
  
• removing the indicator that the machine has gone through an initial setup:
  Single user as above followed by
  rm /var/db/.AppleSetupDone
  rebootSet up again (choose language, keyboard, timezone, etc, and create a new user)

None of these worked.

I reply to myself... I called USA Apple help desk after this post. They were very very polite and professional!

Problem solved on line.

It was enough to restart the lap top in safe mode, let the system finish to update and then restart the computer in normal way.

I'm sure Apple know about this problem.

Thank you so much

Same issue 2015 MB Pro. After 2 calls to AppleCare and all attempts, had to bring it in. Apple genius said it must be brought into Apple Store to resolve. A plist file must be deleted. It is a known issue now. Reloading from time machine does not resolve unless you go back prior to December 13.

I am an IT Consultant in Australia.

I currently have 2 iMacs, 2 MacBook Pros, and 1 MacBook Air that all have either failure to boot or black screen after login problems immediately after the disastrous macOS sierra 10.12.2 update. That's 5 out of 7 of my current local Apple user clients to whom I offer support with essentially dead Macs after the macOS sierra 10.12.2 update.

I have spent more than three hours on the phone with Apple support. They do not acknowledge any problem with this update; their only solution has been to reinstall the Macs, however, as soon as the reinstalled Mac synchronises with iCloud and / or the macOS sierra 10.12.2 update downloads, all the devices end up in the same state.

To repeat, I have tried, safe boot, parameter ram reset, SMC reset, and a full recovery re-install — including being guided through these steps by Apple Support as an extra measure of correct procedure.

When I have told the Apple Support agents that I have already carried out these procedures with Apple Support and as soon as these computers are reconfigured with iCloud and connected to the Internet, which is absolutely necessary, the same problems return after the 10.12.2 update, they are speechless, literally. I have asked if they could please escalate this issue to a higher level in the support hierarchy, but unfortunately this was yesterday, and I haven't had time to go through this whole process again with another technician.

I suspect U/EFI or some other kind of firmware interface problems as with one of the MacBooks Pros before it failed to boot after the 10.12.2 update ran extremely slowly as if no hardware driver optimisations were in place.

I can't imagine these computers being fixed without a new release of the entire macOS sierra installer and fully reinstalling these machines which will cost these customers hundreds of dollars of consulting time for a problem the users did not cause themselves. We are five hours travel time from the nearest Apple Store. All these computers are under AppleCare but that doesn't help — all these customers have to present at a store to get the machines supported. As well, the only solution being offered by Apple being fully reinstalling macOS sierra, while the 10.12.2 update will still be drawn down within a few hours of the reinstallation and the computers will once again be unusable.

If anyone finds a solution to this problem, please post it here. All I can do for my customers now is continue searching for a solution through Google searches and Apple Discussions.

Cheers,

Kirk

The solution lies in the removal of a p-list file via terminal. This was accomplished in my MB Pro 2015 at the Apple Store. My sister had The same problem. Her appointment at the Apple Store was not until next Thursday. I gave her the information from my service and the Applecare supervisor was able to walk her through the removal of this P–list file. At first they claimed no knowledge of this problem. However my technician informed me that this was a known issue. This is the only solution. If your Applecare technician tells you that they are not aware of this problem tell them to contact the Apple Store in Yonkers, New York.

Kirk-- I feel for you. Mine appeared to self correct and after multiple restarts it just seemed to "take". I did everything (nvram, SMC, safe mode, reinstall....everything) and nothing worked. Mine was actually sort of booting (see my prior post). I got to my login screen and entered the password, it would almost get to a fully operationally OS. I was getting calendar notifications in the upper right of the screen and putting the cursor in the lower left would make the dock appear briefly but otherwise I had a black screen with a functioning cursor.

I did speak with an elevated tech person at apple that indicated it was a login problem. One girl figured out after booting to the black screen to type the first letter of the user name, then hit enter, then type the password then hit enter again. Hit enter a few times to make sure. This appeared to work for some people. This may explain it. I do believe it's partially a login issue. I was operating as a single user (only one acct on the computer). The next morning I inexplicably had a guest account which I could log into without issue. When I tried to switch from my guest account after login to my normal user account---same thing---black screen. Totally weird and seems to speak to a login issue.

One other thing to try. Boot to recovery mode (shift and "R" as you probably know). Go to terminal and disable SIP by typing the command: csrutil disable Then reboot, then restart in recovery mode and go back to terminal and type csrutil enable to re-enable SIP. This may be specific to me but it's worth a shot.

I wish you luck. Like I said mine just happened to come to life after about 6 hours of f*cking around with it. Apparently the update finally took.

The genius didn't say. He took my MB Pro to the back and returned in a few minutes with the issue resolved. He said it needed to be done at the store but a supervisor successfully talked my sister through the process and she is the opposite of tech-savvy. I know they used Terminal. If they tell you the issue unknown, ask for a supervisor. It is certainly known if they search correctly. Again, the issue was resolved in the Yonkers, NY Apple Store so if they claim ignorance, tell them to call that store.

holy crap, I can't believe this worked!!! I had been to the Apple Store last Thursday after waiting a week for an appointment as I had the black screen and cursor right after logging in on my 2015 MacBook Pro. I sat at the store for an hour after the genius saying he has no idea, no one else knows, this isn't something he has seen before, completely uncommon. He asked if he could reset the laptop to new, what could I say so I agreed. It worked, but I used time machine to restore and it's like I was back at square one (which is ironic as that was the mall I was at).

I just did what Mark said above after being all desperate searching though see forums and voila!!!! Password a second time worked!

😁 That's exactly what I said to the support guy except that I used a more explicit work than "crap."

Daniel was his name and he fixed my problem in 2 minutes. He's a senior support specialist and my new best friend.

I'm curious how many more will be solved with this...please post you're replies!

M

I have the exact same setup and components. I have been using my MBP for a couple of months since Sierra installed then black screen with cursor. The chime that occurs when you hit enter is the same as the chime that occurs if your cursor is outside the box on the login screen, so move the cursor to where you remember the "enter" box to be and hit "enter". Problem solved (after three OSX re-installs, Installing Yosemite on a separate partition and booting from there, resetting everything, disk repairs etc etc to no avail).

Now disable the password login requirement and the MBP starts without a problem.

Wait for Apple to prepare a fix. This is getting like Windows!

It's a sad ******* state of affairs when everyone is this thread would be better off with a Dell running Windows XP. Apple's MacOS is in serious need of an OS that sticks around for longer than a year so apple can have something that works.

R.I.P. Steve. :(

Same problem on many iMacs and a Pac Pro here after 10.12.2 update.

Solved booting in TARGET DISK mode and deleting the /Library/Preferences/com.apple.loginwindow.plist file

As simple as that. Just need another mac and a thunderbolt cable.

Another workaround is booting in recovery mode and deleting with terminal commands.

the solution of gimisis did solve the issue for me!

Same situation on a Mac Pro (late 2013) with original Apple RAM and SSD. Symptoms identical to above--black screen but able to see/move cursor. Ran Disk Utility from recovery mode, reset PRAM, multiple hard restarts. I finally reinstalled entire drive from Time Machine backup. I can see from Google search that this was a bug in beta versions of Sierra.