I had same problem and followed this guys solution, worked for me.
http://www.tonymacx86.com/graphics/184105-nvidia-releases-alternate-graphics-drivers-os-x-10-11-3-346-03-05-a-6.html#post1210464
I have nvda_drv=1 in config. Type "kextstat | grep nvidia" (no commas of course) in terminal...
All done, no problems just audio to reinstall as usual.
This update doesn't just disable Trim Enable app it removes it.
But now you can use Trimforce Enable in terminal to use Apples own Trim command. Run as root.
Lol Tony beat me to it.
Yes to all those, both Nvidia drivers and Display port and the latest web drivers in OS X. Can't get above 50hz in either operating system without dropping the resolution.
I've had the monitor since Xmas and I've pretty much given up on getting the last 10hz out of it. I'm not sure if I...
Ah yes, I hadn't seen that. Clearly it should be possible then.
The drivers that I'm using in windows are LG's own for this monitor but even those only give me 50hz so I'm not sure what the problem is.
On the LG web site it gives the minimum recommended Nvidia card for this monitor that will give 60hz as the as the 780, so it is looking like 50hz is the 760's limit.
Still a great monitor, except the built in speakers which are truly awful :)
4096 x 2160@50hz is the best I can get in either OS X or Win 8.1. I can get 60hz in Windows if I drop the resolution down to 3840x2160 but then of course I have a 1 inch or so black border at each side.
I have tried both OS X and Nvidia drivers on the hack but the result is the same, 50hz...
This is the boot section of my config file
<key>Boot</key>
<dict>
<key>Arguments</key>
<string>dart=0 kext-dev-mode=1</string>
<key>DefaultVolume</key>
<string>Yosemite_512gb</string>
<key>Debug</key>
<false/>
<key>Legacy</key>
<string>PBR</string>...
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