Ran a system update last week and the computer has booted with this kernel panic message (see attached). I have tried to reboot holding control+R and also have tried zapping the PRAM but nothing is working. Not sure what to try next. Can you help?
Unfortunately, Im not sure what system was running.
iMac (21.5-inch, Late 2012), null
If you can't start up from macOS Recovery
Newer Mac computers and some older Mac computers automatically try to start up from macOS Recovery over the Internet when unable to start up from the built-in recovery system. When that happens, you see a spinning globe instead of an Apple logo during startup. To manually start up from macOS Recovery over the Internet, hold down Option-Command-R or Shift-Option-Command-R at startup.
If you still can't start up from macOS Recovery, and you have a Mac that is able to start up completely, you might be able to create an external Mac startup disk to start up from instead.
If you can't start up from macOS Recovery
Newer Mac computers and some older Mac computers automatically try to start up from macOS Recovery over the Internet when unable to start up from the built-in recovery system. When that happens, you see a spinning globe instead of an Apple logo during startup. To manually start up from macOS Recovery over the Internet, hold down Option-Command-R or Shift-Option-Command-R at startup.
If you still can't start up from macOS Recovery, and you have a Mac that is able to start up completely, you might be able to create an external Mac startup disk to start up from instead.
- Start the Mac from OS X Recovery.
If a kernel panic still occurs when started from Recovery, there is likely a hardware issue. See the "Hardware troubleshooting" section below for additional information.- Open Disk Utility and use "Repair Disk" on your Mac's internal hard drive (named Macintosh HD by default).
Important: If Disk Utility is unable to repair the internal drive, you should back up your important data immediately and if possible, reformat the drive. Consider bringing the Mac to a Genius at an Apple Store or an Apple Authorized Service Provider for further diagnosis. Be sure to ask that, if the drive needs reformatting or replacing, they contact you about escalating your case to a special data recovery service. If you plan to visit an Apple Retail store, you can make a reservation (available in some countries only).
Hi --
Thank you for your response! I managed to start up in recovery mode, but the install of the OS keeps freezing halfway through. Ive tried several times. Is there something you can recommend?
Thank you!
panic! unable to find driver for this platform "ACPI"
