panic (cpu 0 caller

Linc no longer participates in these forums.

Start a new thread in the forum associated with your macOS version (Sierra, El Capitan, etc...). See the "Post" button at the top of this web page.

Then post the complete panic report in your new thread in the forum for your macOS version

Kernel Panic reports: Finder -> Go -> Go to Folder -> /Library/Logs/DiagnosticReports

<http://support.apple.com/kb/ht2546>

<http://support.apple.com/en-us/HT200553>

The panic report should have "panic

" in the file name.

this is for anyone in the future. I'm having this problem and I am pressing shift and safe mode won't go. However it does go if I do it with just the right combination. If I turn on the computer and then hold safe mode and wait for the Apple in progress bar, then let go of shift, sometimes it doesn't go. If I hold safe mode for like six seconds before it shows a progress bar and then let go, oh son it correctly boots into safe mode. I have to mess with it a few times but it went.

If you can't boot in the usual way, try a safe boot.

During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. If you have more than one user account, you must be logged in as an administrator to carry out these instructions.

Safe mode is slower than normal, and some things won’t work at all.

Note: If FileVault is enabled on some models, or if a firmware password is set, or if the startup volume is on a software RAID, you can’t boot in safe mode.

If you're able to boot, launch the Console application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad. Click Utilities, then Console in the icon grid.

Select the most recent panic log under the heading System Diagnostic Reports on the left. If you don't see that heading, select

View ▹ Show Log List

from the menu bar. Post the entire contents of the panic report — the text, please, not a screenshot. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post shutdownStall, spin, or hang reports.

If you don't already have a current backup, back up all data, then reinstall the OS. You don't need to erase the startup volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.

There are ways to back up a computer that isn't fully functional. Ask if you need guidance.

If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it.

You shouldn't as long as nothing goes wrong. You should start creating backups, preferably more than one.

You are welcome.

Once reinstall is complete will I lose all my previous data?

I don't know. I do know that if you don't back up, you're certain to lose every bit of data you have, sooner or later. What happened today was just a foretaste.

I am in the middle of a kernal panic myself, and I have not backed up my computer. I was wondering how you back up a laptop that is not fully functional.

thanks

I have the same problem. I tried the safe boot, pressing and holding Shift, but it is not working for me and i dont see a progress bar or the login screen. I have no idea what to do and i need my MacBook asap and i cant make appointment in Apple Store as they are full. Please Please help me!

You might want to consider starting a new discussion. Since this one is marked solved, less people are likely to look at it.

This helped me sort out my problem - thank you. The link to reinstall the OS. that you included was the key help.

Linc Davis wrote:

If you don't already have a current backup, back up all data, then reinstall the OS. You don't need to erase the startup volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.

There are ways to back up a computer that isn't fully functional. Ask if you need guidance.

If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it.