Mac Pro 2013 Random Crashes

Question

I'm getting what seem to be random system crashes/restarts when the system is just sitting there. Apps are running, but I'm away in another room, or something, and here the bong and return to a fresh startup.
The system log from the console doesn't seem to help. I see this right around the reboot:
Jan 23 07:11:52 RockBox.local secd[209]:  securityd_xpc_dictionary_handler Fantastical[295] copy_matching The operation couldn’t be completed. (OSStatus error -34018 - client has neither application-identifier nor keychain-access-groups entitlements)
Jan 23 07:11:52 RockBox.local Fantastical[295]:  SecOSStatusWith error:[-34018] The operation couldn’t be completed. (OSStatus error -34018 - Remote error : The operation couldn‚Äôt be completed. (OSStatus error -34018 - client has neither application-identifier nor keychain-access-groups entitlements))
Jan 23 07:12:49 RockBox.local com.apple.backupd[7020]: Starting automatic backup
Jan 23 07:12:49 RockBox.local com.apple.backupd[7020]: Backing up to /dev/disk1s2: /Volumes/Time Machine/Backups.backupdb
Jan 23 07:12:52 RockBox.local com.apple.backupd[7020]: Will copy (127.7 MB) from BoxSSD
Jan 23 07:12:52 RockBox.local com.apple.backupd[7020]: Found 100 files (127.7 MB) needing backup
Jan 23 07:12:52 RockBox.local com.apple.backupd[7020]: 14.69 GB required (including padding), 37.92 GB available
Jan 23 07:13:31 RockBox xpcproxy[7037]: assertion failed: 13B4116: xpcproxy + 3438 [3AB894B7-5C91-3252-A567-8EE4A311091E]: 0x2
Jan 23 07:13:53 RockBox.local com.apple.backupd[7020]: Copied 160 items (127.7 MB) from volume BoxSSD. Linked 3571.
Jan 23 07:13:56 RockBox.local com.apple.backupd[7020]: Will copy (2.2 MB) from BoxSSD
Jan 23 07:13:56 RockBox.local com.apple.backupd[7020]: Found 42 files (2.2 MB) needing backup
Jan 23 07:13:56 RockBox.local com.apple.backupd[7020]: 14.54 GB required (including padding), 37.79 GB available
Jan 23 07:14:02 RockBox.local com.apple.backupd[7020]: Copied 49 items (2.2 MB) from volume BoxSSD. Linked 2018.
Jan 23 07:14:05 RockBox.local com.apple.backupd[7020]: Created new backup: 2014-01-23-071405
Jan 23 07:14:09 RockBox.local com.apple.backupd[7020]: Starting post-backup thinning
Jan 23 07:14:55 RockBox.local com.apple.backupd[7020]: Deleted /Volumes/Time Machine/Backups.backupdb/RockBox/2014-01-22-062228 (236.6 MB)
Jan 23 07:14:55 RockBox.local com.apple.backupd[7020]: Post-backup thinning complete: 1 expired backups removed
Jan 23 07:14:55 RockBox.local com.apple.backupd[7020]: Backup completed successfully.
Jan 23 07:16:56 localhost bootlog[0]: BOOT_TIME 1390479416 0
Jan 23 07:16:58 localhost syslogd[19]: Configuration Notice:
          ASL Module "com.apple.appstore" claims selected messages.
          Those messages may not appear in standard system log files or in the ASL database.
Jan 23 07:16:58 localhost syslogd[19]: Configuration Notice:
          ASL Module "com.apple.authd" sharing output destination "/var/log/system.log" with ASL Module "com.apple.asl".
          Output parameters from ASL Module "com.apple.asl" override any specified in ASL Module "com.apple.authd".
Jan 23 07:16:58 localhost syslogd[19]: Configuration Notice:
          ASL Module "com.apple.authd" claims selected messages.
          Those messages may not appear in standard system log files or in the ASL database.
That looks to me as if a Time Machine backup completed, a little time went by, and the it rebooted. I need to catch another couple of reboots to see if it's the same sequence. It doesn't look like Time Machine did it.
Has anyone seen this? Or better yet, solved it?
Bob

Answer 1

This is a very complex picture. I'll address only the most important points. Back up all data before making any changes.
A.
First of all, you have a hardware problem. Most likely, it's the Accelsior device, which has been reported several times to cause instability. You will have to remove it in order to rule it in or out as a suspect. You might have a failing GPU, but I'm not sure.
B.
You installed, and then incompletely removed, the "Genieo" spyware.
Quit the Genieo application, if it's running. Triple-click anywhere in the line below on this page to select it:
/etc/launchd.conf
Right-click or control-click the line and select
Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.
If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar, paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.
A folder will open with a file selected. Move the file to the Trash. You'll be prompted for your administrator password.
IMPORTANT: You must move the above file to the Trash it before continuing. Otherwise the system will become unbootable. In that case, restore from your backup and start over. That's how badly Genieo has sabotaged your system.
Repeat with each of these lines:
/Applications/Genieo.app
/Applications/Uninstall Genieo.app
/Library/Frameworks/GenieoExtra.framework
/Library/LaunchAgents/com.genieo.engine.plist
/Library/LaunchAgents/com.genieoinnovation.macextension.plist
/Library/LaunchDaemons/com.genieoinnovation.macextension.client.plist
/Library/PrivilegedHelperTools/com.genieoinnovation.macextension.client
/usr/lib/libgenkit.dylib
/usr/lib/libimckit.dylib
/usr/lib/libimckitsa.dylib
Some of these items may be absent, in which case you'll get a message that the file doesn't exist. Skip that item and go on to the next one.
Reboot.
From the Safari menu bar, select
Safari ▹ Preferences ▹ Extensions
Uninstall any extensions you don't know you need. If in doubt, uninstall all extensions. Do the equivalent for the Firefox and Chrome browsers, if you use either of those.
This procedure may leave a few files behind, but it should deactivate Genieo. Make sure you don't repeat the mistake that led you to install it. Chances are you got it from one of the Internet's open sewers such as "Softonic" or "CNET Download." Never visit either of those sites again.
C.
Some of your user files (not system files) have incorrect permissions or are locked. This procedure will unlock all your user files, reset their ownership, and remove their access-control lists. If you've set special values for those attributes, they will be reverted. In that case, either stop here, or be prepared to recreate the settings if necessary. Do so only after verifying that those settings didn't cause the problem. If none of this is meaningful to you, you don't need to worry about it.
Step 1
If you have more than one user account, and the one in question is not an administrator account, then temporarily promote it to administrator status in the Users & Groups preference pane. To do that, unlock the preference pane using the credentials of an administrator, check the box marked Allow user to administer this computer, then reboot. You can demote the problem account back to standard status when this step has been completed.
Enter the following command in the Terminal window in the same way as before (triple-click, copy, and paste):
{ sudo chflags -R nouchg,nouappnd ~ $TMPDIR..; sudo chown -R $UID:staff ~ $_; sudo chmod -R u+rwX ~ $_; chmod -R -N ~ $_; } 2>&-
This time you'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning to be careful. If you don’t have a login password, you’ll need to set one before you can run the command. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
The command may take several minutes to run, depending on how many files you have. Wait for a new line ending in a dollar sign ($) to appear, then quit Terminal.
Step 2 (optional)
Take this step only if you have trouble with Step 1 or if it doesn't solve the problem.
Boot into Recovery. When the OS X Utilities screen appears, select
Utilities ▹ Terminal
from the menu bar. A Terminal window will open. In that window, type this:
res
Press the tab key. The partial command you typed will automatically be completed to this:
resetpassword
Press return. A Reset Password window will open. You’re not  going to reset a password.
Select your startup volume ("Macintosh HD," unless you gave it a different name) if not already selected.
Select your username from the menu labeled Select the user account if not already selected.
Under Reset Home Directory Permissions and ACLs, click the Reset button.
Select
 ▹ Restart
from the menu bar.