/var/folders permissions error

[tim_rees]

Just found an entertaining error....

1 AD user in my school could log in, the menu bar would appear, then beach ball, on every newly imaged machine with 10.10.4 up. And I get a lot of the errors shown in the screen shot:

I've badly hacked it, and changed permissions on /var/folders to 0777 and the user can log in again, but does anyone know why? or what caused it? or a better way to fix it?

Thanks!

(The best part, the user was my user, OS X must hate me today... )

[emily]

There must be somethings the OS X water, because I've had a rash of users getting the "Unapproved caller" error dialog which is resolved by deleting the contents of /private/var/. I haven't really dug into why it's happening but more want to reassure you that I don't think it's just you.

[tim_rees]

Thanks, I was thinking as much. I do see a whole heap of other errors for /var (otherwise known as /private/var) but this was the only one stopping my user from logging in!

[htse]

whilst troubleshooting an issue last year with Engineering, I found out OS X keeps a directory for the user in /var for what looks like sandbox-related data for system-level applications, similar to ~/Library/Containers. Everything under the pseudo-random folder with the long string belongs to the user with perms of 0700.