Okay, so I have a system with multiple user accounts setup, and I have two monitors. The first monitor is fine on its native resolution, but the second is too small, so I've been setting a lower resolution to make it more readable.
The problem is that this change is only being remembered by some of my user accounts; the others continue to switch it back to its native resolution.
I'm assuming the problem is with a preferences file somewhere, but I can't seem to find it; the only path I was able to lookup was ~/Library/Preferences/ByHost/com.apple.preference.displays.<UUID>.plist (where UUID is an identifier for your Mac) but that may have been for an older version of OS X, as I can't find such a file on these user accounts.
Is there a different location for this file under newer OS X versions? Or anything else I can try to make the resolution change stick? Currently I have to switch it again every time an affected user account logs in.
Best Answer
So your question was asked ages ago, but before I was able to get my setup to work, I was searching for possible answers myself and happened across this page.
The key in my case was that an admin user was able to get resolution changes to stick, but non-admin "standard" users were not. Once I changed it with the admin user, all of the standard users would keep the resolution.
If that doesn't solve things for you, you mentioned trying a PRAM reset unsuccessfully. Have you tried resetting NVRAM, which newer Macs use rather than PRAM to store some display resolution info?