Hi,
I had to unplug my second screen which is an LG and connected through Thunderbolt. Since doing that I can not get the resolution to adjust correctly. When I try to do it through display there are only 2 resolution options and they don't work. Could you please help.
Thanks
iMac with Retina 5K display, OS X El Capitan (10.11.5), AirPort Time Capsule Version 7.7.3