You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Green line appears on screen

On my MacBook Pro 2017 Retina display I have this small green line appearing on the left side of the screen. The line comes and goes and some times when I click on it it goes away. Any ideas?

Posted on Feb 4, 2022 2:39 PM

Top-ranking reply

HWTech

Level 9

60,632 points

Posted on Feb 4, 2022 3:44 PM

Usually a vertical line like that is due to a hardware issue with the Display Assembly. There are two ways you can confirm.

Take a screenshot, then view it making sure to move the picture off center so you can see whether the line exists.
Connect an external display and enable mirroring.

If you do not see the vertical line on the external display or in the screenshot (remember to move the picture slightly off center), then there is a hardware issue with the built-in Display Assembly.

View in context

Green line appears on screen

Similar questions