Unable to boot after macOS Sierra upgrade

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Level 1

102 points

Unable to boot after macOS Sierra upgrade

Hello,

I'm trying to assist a friend living Switzerland (I'm now in Spain) to upgrade his Mac Mini from OSX (I guess Lion or Mavericks) to macOS Sierra – I helped as much as I could thought a TeamViewer session then, when the system rebooted to proceed with the installation I had to leave him "alone".

After a couple of hours he sent me two screen shots telling me he is not able to use the system anymore.

The images – see at the end on the post – shows the black boot up screen with the Apple logo and the progress bar and a window showing the message (translated from Italian): "identityservicesd wants to sign using the key <key> in the keychain. Do you let it access to this element?"

And then 3 buttons with the following options:

Always
Refuse
Allow

I told him to click on the "Allow" button – at least to be able to reach the login screen – but the problem is that the (Apple wireless) mouse and the keyboard are not not yet recognised and usable.

Have anyone able to give us a clue about how to proceed?

Thank you so much in advance for your help!

Ugo

Images:

Message was edited by: MrCamaleo to add the images

Mac mini (Late 2012), OS X Mavericks (10.9.5), Late 2012, 2.5 Intel Core i5, 16Gb

Posted on Jan 21, 2017 12:47 PM

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Answer 1

Kappy

Level 10

362,007 points

Jan 21, 2017 12:58 PM in response to MrCamaleo

Possible Fixes for El Capitan and Later Installations

You should try each, one at a time, then test to see if the problem is fixed before going on to the next.

Be sure to backup your files before proceeding if possible.

Resetting your Mac’s PRAM and NVRAM
Reset the System Management Controller (SMC)
Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
Repair the disk by booting the from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volumeentry from the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and returnto the Utility Menu. Restart the computer from the Apple Menu.
Create a New User Account Open Users & Groups preferences. Click on the lock icon and enter your Admin password when prompted. On the left under Current User click on the Add [+] button below Login Options. Setup a new Admin user account. Upon completion log out of your current account then log into the new account. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another.
Install Combo Updater Download macOS Sierra 10.12.2 Combo Update and install.
Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.
Erase and Install OS X Restart the computer. Immediately after the chime hold down the Command and R keys until the Apple logo appears. When the Utility Menu appears:

Select Disk Utility from the Utility Menu and click on Continue button.

When Disk Utility loads select the drive (out-dented entry) from the Device list.

Click on the Erase icon in Disk Utility's toolbar. A panel will drop down.

Set the Format type to Mac OS Extended (Journaled.)

Click on the Apply button, then wait for the Done button to activate and click on it.

Quit Disk Utility and return to the Utility Menu.

Select Reinstall OS X and click on the Continuebutton.

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Answer 2

MrCamaleo Author

Level 1

102 points

Jan 22, 2017 7:23 AM in response to Kappy

thank you for your detailed answer, however my friend left the Mac open all night long and this morning everything seems to work properly!

🙂🙂

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