27" iMAC 5K lock screen image through and after login desktop shows a zigzag border and previously opened windows

Hi all,


Did anyone experienced this issue as shown in below thread? Please share if you were able to resolve this issue.


27" Imac 5k lock screen is see thru! - Apple Community


iMac 27″, macOS 11.7

Posted on Nov 6, 2022 4:52 PM

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Question marked as Top-ranking reply

Posted on Nov 6, 2022 5:00 PM

Image persistence is not permanent. It can be avoided by minimizing windows or by setting the display to sleep after 10 or 15 minutes.


double click on >> Avoiding image persistence on Apple displays - Apple Support

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27" iMAC 5K lock screen image through and after login desktop shows a zigzag border and previously opened windows

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