Can't stop MacBook Pro after upgrade to Mac OS Sierra

Yesterday I had upgraded my MacBook Pro since OS X El Capitan with macOS Sierra. Unfortunately I can't stop him, I can't even restart. Whenever I have start/stop I get a black screen (no slider) and it remains frozen. I have to hold the power button for a few seconds so that he will stop. I want to avoid cleaning the installation and configuring everything. Does anyone have an idea what causes this problem? I cleaned the cache and reset the NVRAM without effect.

... I cleaned the caches

I recommend that you do not have this, especially with a 'clean' non-Apple utility. All these things can do is cause problems. A SMC reset will remove some files from the system cache: reset the management system (SCM) controller on your Mac. That's all that anyone should ever do.

Back up your Mac if you have not already done so. Read https://www.apple.com/support/backup/to learn how to do this please. To learn how to use Time Machine read to use Time Machine to back up or restore your Mac.

Then, shut down your Mac and restart in 'Safe Mode '. To learn how to do it please read: try safe mode if your Mac does not start-up. Compare works your Mac in Mode for how safe it was.

Then restart normally. If the same problem comes back, please read the section If a problem does not occur in safe mode for actions recommended to Apple.

Finally, you can temporarily create a new user account and log into this account to determine if the problem also exists when connected to this account. To learn how to read How to test a question to another user on your Mac account. When you are finished troubleshooting, you can remove the temporary user account by following these instructions: macOS Sierra: remove a user or a group. Before you delete, confirm that you have not need of all the files that you have possibly set in this account.

Tags: Notebooks

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