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Imac stuck on Boot up

Hi,


Iv had my Imac off for a few days and now turning it on, it will not boot up.


The keyboard is mac and its wired but when pressing any buttons it does not do anything.


I can't even get into recovery mode or do a full hard reset.


Please can anyone help. Iv tried to. Power it down manually in hope it will boot up but the boot up screen gets to the end and then freezes.

iMac 27″, macOS 10.13

Posted on Jan 10, 2022 4:59 PM

Reply
Question marked as Top-ranking reply

Posted on Jan 11, 2022 7:38 AM

If your Mac doesn't turn on


If your Mac doesn't seem to turn on after you press the power button, follow these steps.


Force your Mac to turn off and back on

Your Mac might be turned on but appear to be turned off, even though it's connected to AC power and a working display. Follow these steps.

  1. Press and hold the power button on your Mac for at least 10 seconds, then release. If your Mac is turned on, this forces it to turn off.
  2. If you see no change on your Mac, press and release the power button.
  3. If your Mac now turns on but stops at some other screen during startup, follow the steps for when your Mac doesn't start up all the way.

 


Revive the firmware, if applicable

If you're using a Mac with Apple silicon or a Mac with the Apple T2 Security Chip, in rare circumstances the firmware stored in your computer's memory might need to be revived or restored. To do that, you need these items:

  • Another Mac with macOS Catalina 10.15.6 or later and the latest Apple Configurator app, available free of charge from the App Store.
  • A USB-C to USB-C cable or USB-A to USB-C cable to connect the computers to each other. The cable must support both power and data. Thunderbolt 3 cables aren’t supported.

If you have those items, follow the appropriate steps:

 

If your Mac still doesn't turn on, you need help with these instructions, or you don't have the items you need, please contact Apple Support.


3 replies
Question marked as Top-ranking reply

Jan 11, 2022 7:38 AM in response to Mosajad

If your Mac doesn't turn on


If your Mac doesn't seem to turn on after you press the power button, follow these steps.


Force your Mac to turn off and back on

Your Mac might be turned on but appear to be turned off, even though it's connected to AC power and a working display. Follow these steps.

  1. Press and hold the power button on your Mac for at least 10 seconds, then release. If your Mac is turned on, this forces it to turn off.
  2. If you see no change on your Mac, press and release the power button.
  3. If your Mac now turns on but stops at some other screen during startup, follow the steps for when your Mac doesn't start up all the way.

 


Revive the firmware, if applicable

If you're using a Mac with Apple silicon or a Mac with the Apple T2 Security Chip, in rare circumstances the firmware stored in your computer's memory might need to be revived or restored. To do that, you need these items:

  • Another Mac with macOS Catalina 10.15.6 or later and the latest Apple Configurator app, available free of charge from the App Store.
  • A USB-C to USB-C cable or USB-A to USB-C cable to connect the computers to each other. The cable must support both power and data. Thunderbolt 3 cables aren’t supported.

If you have those items, follow the appropriate steps:

 

If your Mac still doesn't turn on, you need help with these instructions, or you don't have the items you need, please contact Apple Support.


Jan 10, 2022 6:01 PM in response to Mosajad

Start with this if IntelMac...


Have you done a PRAM reset, CMD+Option+p+r...


http://support.apple.com/kb/HT1379


In fact, do 3 in a row, takes a bit of time.


Intel-based Macs: Resetting the System Management Controller (SMC)...


http://support.apple.com/kb/HT3964


Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.


Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

Jan 11, 2022 4:14 AM in response to BDAqua

Hi,


Thank you for your reply. It's much appreciated.


I'm afraid I can't do any of the steps, as the keyboard is not responding when the Imac is starting up. Iv tried 3 different keyboards including Windows keyboard. I know the keyboards are not an issue as I have tried them with a friend's machine.


But the boot screen goes all the way to the end and just sits there. Iv even left it running for a few days thinking it might need some extra time but this does not result in anything.


Worried I would loose all my work.


I have unplugged everything from the back too to make sure it's not interfering with the likes of a printer, external drive and so on.


Any help on next steps is much appreciated.

Imac stuck on Boot up

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