Q: Set up 2nd display using non-apple monitor
iMac 21.5" 4K, 10.11.6 add either a ViewSonic monitor #VA2055Sa, or #VX2253MH as 2nd Display.
Either monitor will show up, but the resolution, which VS says the resolution will go to 1920x1080, but does not appear in the setup menu. They have a workaround with a PC, but have not been able to find one from the Mac side.
Does anyone else have this problem, and or a possibility of soling it? We tried using a PC, but couldn't get it to work there either. Hoping someone has a clue.
Posted on Aug 3, 2016 12:49 PM
1. What Mini DisplayPort adapter and cable are you using....?
2. Do you see the correct Resolution if you hold the Option(Alt) key while selecting the Scaled button...?
For some reference articles,
check out > Apple Mini DisplayPort adapters: Frequently asked questions (FAQ) - Apple Support
and > Get help with video issues on external displays connected to your Mac - Apple Support
Posted on Aug 3, 2016 8:01 PM