My computer shows vertical lines after the 26.7.1 download. anyone had any negative download issues?
1tcb
User level: Level 1 (4 points)
User level: Level 1 (4 points)Tahoe 26.7.1 update issues
Posted on Oct 2, 2026 12:58 PM
2 replies
neuroanatomist
User level: Level 9 (72,871 points)
User level: Level 9 (72,871 points)Oct 2, 2026 5:49 PM in response to 1tcb
Display artifacts can be caused by software or hardware issues. First step is to reboot your Mac (easy fix for many software issues). If the problem persists, take a screenshot (Command-Shift-3) and if the issue on the display does not show up in the screenshot, the most likely cause is a hardware problem with the display (cable/panel/etc.). In that case, the next step is to contact Apple for service.
Product Service and Repair Information - Official Apple Support
Owl-53
User level: Level 10 (123,805 points)
User level: Level 10 (123,805 points)Oct 3, 2026 2:25 PM in response to 1tcb
Has anyone else experienced display problems after downloading or installing macOS Tahoe 26.7.1? In particular, are you seeing vertical lines on a MacBook Air?
Before suggesting anything, it would help to know what troubleshooting you have already tried. What exact MacBook Air model/year do you have, and did the lines appear immediately after the download, during the installation/restart, or only after the update finished?
If you can, also check whether the lines appear in a screenshot and whether they remain after restarting the Mac.
Apple’s published information for Tahoe 26.7.1 identifies a CoreGraphics security fix but does not mention vertical-line or other display problems. That does not establish whether the update is related to what you’re seeing.
Once we have those details, any troubleshooting suggestions can be based on the applicable Apple or Apple Developer documentation and the evidence in your post, rather than assumptions. That also helps avoid suggesting anything you have already tried.
Originally posted at discussions.apple.com/thread/256369259