Changed resolution of the secondary display: cannot reset

I use a second monitor on my Imac 27 "OS 10.11.3 and have never had a problem with the resolution on the second monitor connected with a VGA cable. Suddenly this morning on this screen resolution is 800 x 600. I can scale, move in 1280 x 1024, have held down the Option key to detect the resolution of more options (the monitor displays the suggested resolution is 1980 x 1080, but I can't find how to add this resolution who worked until today. Puzzled and frustrated.

Hi we04ndy,

I understand that you have a problem with the resolution of the screen. Let "see if we can get this sorted out.

I don't know, after the second article, if you use an Apple Mini DisplayPort to VGA, you will get a 1920 x 1200 max resolution or 1600 x 1200 depending on the discount rate. I would look on the troubleshooting in the first article to review what to do if you get undesirable results with the resolution of your secondary display. I would start with the SMC reset and NVRAM for you get started.

Get help with graphical problems on external displays connected to your Mac.
https://support.Apple.com/en-us/HT201177

Apple Mini DisplayPort adapters: frequently asked questions (FAQ)
https://support.Apple.com/en-us/HT204149

Nice day

Tags: Mac OS & System Software

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