Mac screen

why does my mac has vertical lines on screen?

MacBook Air 13″, macOS 10.12

Posted on Sep 2, 2021 04:16 PM

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leroydouglas

Community+ 2025

Level 10

196,500 points

Posted on Sep 3, 2021 10:20 AM

yoyipatis wrote:

why does my mac has vertical lines on screen?

Sounds like a display issue or projector cable attaching the display...

You can bypass the display to test using an external monitor— if no issue this implicates your display; same issue implicates your GPU.

Alternatively to trouble shoot— A screen shot bypasses the display, coming directly from the GPU.

Learn how to get your Mac fixed and how much it will cost. https://support.apple.com/mac/repair/service

Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095

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Top-ranking reply

leroydouglas

Community+ 2025

Level 10

196,500 points

Sep 3, 2021 10:20 AM in response to yoyipatis

yoyipatis wrote:

why does my mac has vertical lines on screen?

Sounds like a display issue or projector cable attaching the display...

You can bypass the display to test using an external monitor— if no issue this implicates your display; same issue implicates your GPU.

Alternatively to trouble shoot— A screen shot bypasses the display, coming directly from the GPU.

Learn how to get your Mac fixed and how much it will cost. https://support.apple.com/mac/repair/service

Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095

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Mac screen