Q: Since updating to El Capitan to ver 10.11.1, i get random reboots and its driving me crazy.

Kernel Panic reports

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

<https://support.apple.com/en-us/HT201753>

Please post the EtreCheck output

<https://discussions.apple.com/docs/DOC-6174>

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.

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 and start typing the name.

In the Console window, select

          DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports

(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select

          View ▹ Show Log List

from the menu bar.

There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.

If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.

In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)

Please don’t post other kinds of diagnostic report.

I know the report is long, maybe several hundred lines. Please post all of it anyway.

When you post the report, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That's a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.

If you have an account on Pastebin, please don't select Private from the Paste Exposure menu on the page, because then no one but you will be able to see it.

I have the same problem with 10.11.1 on my late 2013 imac. It reboots about once a day with a kernel panic. I contacted Apple Support and was told to remove all startup programs. This did not help. I subsequently realised that every time it happened I was either entering a search / url in Safari or opening a new tab. I changed to Firefox and I have had no reboots since. I will need to contact support again since I am not happy that I can't use Safari. Note: Firefox has a reported problem that caused Apple Mail to crash in El Capitan. Altogether a mess!

If you would like help from the forum, suggest you post the kernel panic on a "New" thread

Kernel Panic reports

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

<https://support.apple.com/en-us/HT201753>

Along with the output from EtreCheck

<https://discussions.apple.com/docs/DOC-6174>

I have now established that the cause of the OS reboots and Apple Mail crashes was an anti virus / anti phishing program called Trusteer Rapport which is recommended and supplied by many major banks. I uninstalled this program and Apple Mail immediately started working as normal. I have reverted to Safari and have had no Kernel Panics at all in the last week. So, I think it is safe to assume that this problem was also caused by Rapport.