Hold down the Power button until it turns off."
Getting your Mac working again may be as simple as powering it back on.
Many kernel panics don’t recur, and your Mac operates as you expect.
What Causes a Kernel Panic?
These include poorly written applications,plug-ins, add-ons, drivers, and other software components.
Restarting your Mac corrects the problem.
However, if the kernel panic recurs several times, it’s time to act.
Restart Using Safe Boot
Start the Mac by holding down theShiftkey and pressing thepowerbutton.
Hold down the Shift key until your Mac starts.
This process is called aSafe Boot.
During a Safe Boot, the Mac completes a basic check of the startup drive’s directory structure.
If everything is OK, the operating system loads the bare minimum number of extensions it needs to run.
Now try starting your Mac normally.
Use the Console app located atApplications>Utilityto view the crash logs.
throw in “Console” into Spotlight Search to quickly bring up the utility.
From the left sidebar, selectDiagnostic Reportsand thenselect the most recent crash report to view it.
In older macOS versions, you may first need to selectLibrary/Logsto dive into the Diagnostics Reports folder.
Alternatively, to view the diagnostics report directly, navigate toFinderand selectGo.
Hold down theOptionkey and then selectLibrary.
Check theCrash Reportsfolder in Console for any recent log entries.
Look through the report for a time corresponding to when the kernel panic occurred.
It may provide a clue as to what events were taking place immediately before the panic was declared.
Testing Hardware
Isolate your hardware by disconnecting everything but the keyboard and mouse from your Mac.
When everything but the keyboard and mouse is disconnected, restart the Mac.
Devices such as wired routers, switches, and printers can all be the source of problems.
Of course, other hardware problems generate a kernel panic beyond the drive.
RAM glitches or even problems with basic components of your Mac, such as the processor or graphics system.
Once yourMac boots, disable startup andlogin itemsin theAccountsorUsers & Groupssystem preference pane.
Some applications install system-wide startup items.
you’re able to find these items at: /Library/StartupItems on some Macs.
Move all the subfolders to the desktop (you may need to provide anadministrator passwordto move them).
When the startup and login items are disabled, power cycle your Mac normally.
you’re able to use FontBook to check any fonts you installed with FontBook.
Start in Safe Boot mode and then launch FontBook, which is located in the Applications folder.
Select multiple fonts and then use theFont Validationoption to check for errors and corrupt font files.
If you find any problems, use FontBook to deactivate the fonts.
