External screen flickers and snowy with El Capitan

I have an intermittent problem on a new LG Display.

LG Display 27MP58 27 "connected to the Macbook Air 11' with El Capitan (10.11.4) flickers and the picture goes snowy. This happens about 10% of the time.

So to determine if it was the connection, the display or the computer I plugged in the screen of a Macbook Air with Yosemite and it was very stable. This convinced me that el Capitan is the culprit.

Given that I'm reluctant to downgrade the OS to Yosemite, is there another fix for flickering with El Capitan.

Thank you

Hello senorbill2000,

I understand that you have a problem with an external display connected to your MacBook Air. Have you considered as reinstall OS X Yosemite, but want to discover some additional troubleshooting options before you go down this path. I can help you with that.

At any time you have problems with the display, I always begin with ensure the connection between the two. Start by reseating the cable and also check that your Mac is up-to-date with it's software. Another thing to try is to reset the SMC and the NVRAM. Take a look at the article below and it will be presented in more detail on what to do when you encounter problems with your external monitor.

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

Take care

Tags: Mac OS & System Software

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