Q: Security Update Causes Apps To Be Damaged

I am booted up to a external drive. The search for the folder to delete only finds the folder on the external drive. So far I am unable to find the folder on my Fusion drive, which is my normal full boot drive. Thus, I am unable to try this fix so far.

In the Finder, under the Go menu at the top of the screen, select Go To Folder and paste in  /private/var/folders and a window will open with the directory opened.

Delete the stuff in that folder (the system will prompt you for your admin password. Enter  it) empty the trash and restart.

The folder is an "invisible" file. Only visible when you use the Go To Folder as specified in the instructions.

A search or spotlight search will not yield the result you're after.
Follow the instructions above.

I have done that, but it only finds the files on the external drive that I have booted up on. The Fusion drive is where I need to delete the files, and it will not find them on that drive. I suspect it only finds files on the current boot drive (which is and external drive). Unfortunately I cannot boot from the Fusion drive, thus I cannot delete these files from there, since they can't be found.

take a look at this article.

http://www.howtogeek.com/211496/how-to-hide-files-and-view-hidden-files-on-mac-o s-x

You could also use the utility "Easy Find" which will show you invisible files and then let you navigate to them just by clicking on the file. If there's a free trial, give it a shot.

http://www.devon-technologies.com/

Well worth the money.

This is a good article too.

http://ianlunn.co.uk/articles/quickly-showhide-hidden-files-mac-os-x-mavericks/

Good luck.

Thanks a million, Ivlike!  THAT saved my day (and night) !

Thanks. Still muddling through this. Wearing me out. Not fixed yet. But in my gut I believe deleting those files would do it. If I can only find them. Booting into safe boot mode on my external drive takes at least 30 minutes. Painful.

Paul,

According to the recommendations here: https://discussions.apple.com/message/29701791#message29701791

I deleted a subfolder "C", but it did not help.

Since the entire folder /private/var/folders is used for "per-user temporary files and caches" (man hier), and, taking into consideration the numerous reports of normal operation by another user, I decided to remove all of its contents but not the folder itself.

N.B.! Do not delete the folder folders ! And don't touch anything else in /private/var/

You are a GENIUS!!  Thank you so much!!!! I did the commands in Terminal to show hidden files. There it was. Went to the /private/var/folders and deleted the contents of the Folders folder. Viola!! Success. My computer boots up! Fantastic. I had Apple on the phone this morning and got set up to go into the store Sunday for the earliest appointment. I'm cancelling that!  Git 'er done!!!    I love it when the Community Discussions fixes an issue! Great job. If I hadn't had a bootable drive to fall back on I would have been toast. I have Carbon Copy Cloner and absolutely love it. Highly recommend it if anyone is on the fence. Get it!! Backup your computers to a bootable drive. Sooner or later it will more than pay for itself!!   I'm out of here. (Unless anyone has some questions). 

And for the record, I also lost one of my two user login files after a system update some months back. I don't know what's happening to Apple updates but because of that I started making bootable backups. It is not an option. It is a necessity folks!  

And I hope Apple is paying attention. They have to fix this. Now that I deleted those files, I checked the Apps Update and the Security Patch that hosed me is showing up as a necessary Update. No way I am applying that update again. Not until Apple puts out a patched Security update!   But that is proof solid that the patch puts something in that hidden folder that is creating bad problems for people. Please fix this Apple!!  

My macbook pro is totally screwed over.  Even safe boot wont work - constant LSD quit unexpectedly errors.  Can't get any apps to run.  Restarting finder no help.  This has bricked my MBP.

The fix is in this thread as long as you can boot to an external drive. If you can't do that you do indeed have problems.

This worked for my Mac that absolutely would not boot up even after 3 full system installs. Took me a full day to find this fix. The fix took less than 10 minutes once I figured it out.

In the Finder, under the Go menu at the top of the screen, select Go To Folder and paste in  /private/var/folders and a window will open with the directory opened.

Delete the stuff in that folder (the system will prompt you for your admin password. Enter  it)

empty the trash and restart.   Do Not Delete the Folders folder, only it's contents.

The folder is an "invisible" file. Only visible when you use the Go To Folder as specified in the instructions.

A search or spotlight search will not yield the result you're after.

I could not get my system to be responsive.  I used go to folder to get to /private/var/folders, but after 30 minutes, the contents would not load(nor any folder).  So I rebooted to the emergency disk - and used terminal there to cd /Volumes/{sytem disk}/private/var/folders and removed everything.  When I rebooted it got as far as a black screen with mouse pointer - no further.  I backed out and tried safe boot.  10 minutes and still booting......white screen, mouse - nothing.  Screwed.

If it were me, I would try this. A system restore just might do the trick. Non-destructive.

Boot up and hold the CMD and R until the Apple and progress appear. Let go and use the menu that comes up.

boot and hold commands below:

CMD R to re-write system software (non-destructive)

All my apps got damaged. Basically the entire machine got up in smoke. I had to get a new one with Snow Leopard running, now all app runs at 3x the speed and on top of that I don't have to bother with useless updates that destroys and makes our machine vulnerable to all sorts of things.

About OS X Recovery - Apple Support