Quick Preview a video file reboots computer

My MacPro has suddenly started rebooting when I quick preview (spacebar) a (mostly) video file, although it does happen when quick previewing other files less frequently.

Occasionally happens when I do a spotlight search.


Might not happen on the first video, but by the third it will

I am on El Capitan

MacPro 4,1

I have tried a fresh OS install on a new Hard Drive, still happens.

When I boot in safe mode it does not seem to happen.

Any help would be appreciated.



Mac Pro, OS X 10.11

Posted on May 7, 2019 1:39 AM

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Question marked as Top-ranking reply

Posted on May 7, 2019 8:50 AM

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor.  Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown. If the log won’t post, try posting it in Pastebin and provide a link in a reply        Pastebin


Etrecheck – System Information

13 replies
Question marked as Top-ranking reply

May 7, 2019 8:50 AM in response to thirdpurple

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor.  Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown. If the log won’t post, try posting it in Pastebin and provide a link in a reply        Pastebin


Etrecheck – System Information

May 8, 2019 5:50 AM in response to thirdpurple

Do you have any panic reports from the Mac restarts?

Please post a few of the most recent Panic reports.

Look for the Kernel Panic reports at:

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.

You can use the "Additional Text" box when you Reply


I notice you have 3rd party RAM. You might want to run Rember just to see if it picks up any RAM issues

<http://www.kelleycomputing.net/rember/>

.

Quit as many apps and background tasks as you can (such as menu bar items) so more RAM is available for testing.  Booting into Safe mode <http://support.apple.com/kb/ht1564> can also free up more RAM for testing, by not loading any 3rd party additions you may have installed.

.

Set Loops: [X] Maximum

and run overnight


And speaking of RAM, it is best to add RAM is equal sized pairs so that the Mac can use interleaved access to get an extra 10% to 15% performance improvement.

May 8, 2019 10:52 AM in response to BobHarris

Thanks for the help.

There are no panic reports in the log folder I am afraid. I dont get any error messages when it reboots, just black screen and then boots up.

I have run rember without error, but not for max loops. I will give that a go.

I am running an SSD in my DVD/CD tray, and also have Tray 1 with El Capitan on for testing, I have swapped the SSD, done a clean install but still getting the reboot. Seems worse on the SSD than if I boot up in tray 1.

System has been very solid for a number of years without significant change.

Thanks again.

May 7, 2019 1:27 PM in response to thirdpurple

You have adware installed. 


Run EtreCheck again.


In the Sidebar, click the Security button.


 Locate  and remove entries under  Adware and Unsigned files.


 Click the “Remove” button.


Try downloading this program which was written by Thomas R, a long time poster. The program will search for malware/adware The program will do the work for you which makes it easy. It may be necessary to run more than one scan. After running the scans, restart the computer.


Malwarebytes Anti-Malware for Mac      10.10 and later


Malwarebytes uninstall


Most posters recommend not using cleaning programs. They can destroy normal computer operations.


CleanMyMac 2 uninstall


CleanMyMac3 Uninstall


Check for any remaining associated files using these programs.


EasyFind – Spotlight Replacement


Find Any File


I would uninstall Sophos. It tends to interfere with the computer's operation while providing minimal to no benefit unless you work with Windows files. Most long time posters recommend not using antivirus software or cleaning software such as CleanMyMac.


Sophos Un-install

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Quick Preview a video file reboots computer

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