com.apple.dock.extra crash....

Hello NJHJR,

All you are really doing is corrupting your operating system. That will clear up the error but only because you have deleted that part of the operating system that was reporting the problem. This wouldn't even be possible on El Capitan.

Deleting preference files is really not a good idea. It probably isn't going to break too much but it will also probably not have much effect. You would have to make sure to delete those files when the process that created them is not running. Otherwise, it will just re-create the same corrupt files.

No problem man. I figured since I had a carbon copied backup of my hard drive, the worst that could happen would be me needing to restore back to the state it was in, with the popup and trying something new. Just glad the message stopped popping up, it got really annoying after the first few times. Glad I could help.

I won't say you're wrong, but I respectfully disagree. I'm using Mountain Lion on two different devices (MBP & Mac Mini) and before I deleted anything on the MBP (device with the corrupted files) and before backing up my hard drive, I checked for those same files on the Mac Mini as I'm running the same OS on both devices and one of the first things I noticed was that one of the files responsible for the error was missing altogether from the MBP, but was present on the Mac Mini. Also, the MBP had three different variations of the com.apple.dock plist, one regular, and two with a bunch of numbers and letters behind them, which wasn't being shown as plist files btw because they were corrupted, while the Mac Mini only had one plist file. After deleting everything, only one of everything was rebuilt, meaning the corrupt files weren't recreated. I have edited four videos, and updated three apps, one which needed a computer restart to finish the process, since deleting those files and letting the OS rebuild them and I've yet to see the error message again, so I'm positive now after multiple restarts that the corrupted files won't be recreated. Plus, the dock works, iTunes works (which I believe brought the error after an update), all of my everyday apps work, everything went as planned in disk utility (Disk doesn't need to be repaired because everything is ok after verifying it and all Disk permissions were verified without the need for repair) and most importantly, my laptop is still running smoothly. When the error popped up, my device would lag and I'd get an occasional spinning beach ball, since deleting those files, I no longer get that lag nor the beach ball.

Hello again NJHJR,

But you referenced about 5 distinct kinds of files, from user preferences to operating system executables. Some will be rebuilt automatically. But some are gone forever. It is like someone complaining about errors in Mail. If they delete the app, they won't get those errors anymore. But they also won't get their mail.

There may be multiple issues that display the same apparent crashes and error messages. If someone reports problems with the dock and they have a 3rd party dock hacking app, the first step is always to remove the 3rd party software and see if that fixes the problem for that specific user. The fix may not apply for anyone else.

You're definitely right about that, which is why I refused to call you wrong in my initial response. My end result isn't guaranteed for everyone. In my case, every single thing I deleted, was rebuilt; there wasn't anything deleted that didn't come back after the system restart. And because of that, and the fact that me and the OP is running the same exact OS, I assumed what worked for me would work for him.

Advice was already given to him from you to remove his third party dock app, and I assumed he tried that already and the issue still existed, so my advice was to be tried after following everything else mentioned before my response. If he took the advice from Eric Root, he should have everything backed up, so if anything goes wrong, he could simply restore back to it's current state and scratch it off as a fix if it didn't work out for him.

I know my answer may not be the answer for everyone, but it was tested and worked flawlessly for me, so I'm just offering a way. He doesn't have to do it my way, but if he's as desperate and/or as annoyed as I was, then there's nothing to lose with everything already backed up.

com.apple.dock.extra.peer.0x7fca8b4193a0.xpcq c... | Apple Support Communities

It's a bug in the iTunesDockTile.docktileplugin from a recent update of iTunes.

I disabled the plugin and the crashes stopped.

In terminal:

sudo cp -rp "/Applications/iTunes.app/Contents/PlugIns" "/Applications/iTunes.app/Contents/PlugIns.bak"

sudo rm -rf "/Applications/iTunes.app/Contents/PlugIns/iTunesDockTile.docktileplugin"

Hope this helps.

I've just stumbled upon this thread and I would like to say thank you very much for your Command-R Recovery suggestion, I've not had a recurrence of the annoying com.apple.dock.extra since following your advice.

You are welcome.

> Does 12.4 update fix this issue?

It does not, unfortunately.

Hope this helps.