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.

White horizontal line

Since updating my iMac to the latest software update. My iMac has started showing a white horizontal line on the top of my Lock Screen. Has anyone else had this issue and knows of a way to fix it?

iMac Line (2012 and Later)

Posted on Nov 12, 2020 12:42 PM

Top-ranking reply

rkaufmann87

Level 10

144,084 points

Posted on Nov 12, 2020 12:47 PM

Please try resetting the NVRAM per the instruction in NVRAM Reset. If that does not work, please restart in Safe Mode per Safe Mode Reset instructions.

If the problem persists, please let us know and we can ask you to post an EtreCheck report of your system to look for obvious issues.

View in context

White horizontal line

Similar questions