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Helpful answers
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Oct 5, 2015 2:54 PM in response to Alanisnotalwayshappyby joe_7399,Greetings Alanisnotalwayshappy,
Thank you for being a long time Apple Support Community member and for posting this question!
I understand that when your MacBook Air wakes from sleep while using an external display, you see a green tint to the screen. To begin troubleshooting this situation, I would recommend reading over and working through the information in the following article.
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
This article includes several steps including checking connections, resetting the system, and resetting the resolution that I would suggest working through.
Please be sure to reply and let us know if these steps here helpful or to provide further information. We are glad that you are a part of the Apple Support Communities and look forward to your continued participation!
Cheers!
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Oct 5, 2015 3:10 PM in response to joe_7399by Alanisnotalwayshappy,1. This began after updating to 10.11
2. This never happened in 26 months with 10.9 and 10.10.
3. I've checked the cables obviously - and it works after disconnecting and re-connecting - but this is forced by coming out of sleep in the first place.
So, as I clarified in the first post, it is NOT a hardware issue. It is NOT a cable issue. It is a 10.11 issue.
