Persistent horizontal lines appear on iMac screen
I have been having the same issue and a huge vertical lines started appearing while I'm working. Note that I never dropped, neither change my office position.
I purchased this iMac M1 on July 12, 2021, and it has been an absolute joy to use until recently. On July 8, 2023, while immersed in my work, persistent horizontal lines suddenly materialized on my iMac's screen. These lines have severely impacted my ability to use my computer effectively. In an attempt to diagnose the issue, I connected an external display, and thankfully, it functions flawlessly, confirming that the problem lies within my iMac's internal display. I also reinstalled the operating system and refrained from using the computer for two days, but to no avail. :(
The prospect of a costly screen replacement is OMG so expensive, especially given the uncertainty that it will permanently resolve the issue.
Any luck?
iMac 24″, macOS 14.5
