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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
I appear to have a permanent border around my desktop made up of a thin red line. Any suggestions as to what it is and how to get rid of it will be gratefully received.
MacBook Pro (13-inch Mid 2012), macOS Sierra (10.12.2)
Strange...! That sounds like the red frame that you see while you adjust the Arrangement in dual displays.
Do you have a display adapter plugged in, run dual displays or have the Displays Preference Arrangement tab open...?
If not, see if an NVRAM reset will clear the problem.
see > How to reset NVRAM on your Mac - Apple Support
If not, try starting up in Safe Mode.
see > Use safe mode to isolate issues with your Mac - Apple Support
Strange...! That sounds like the red frame that you see while you adjust the Arrangement in dual displays.
Do you have a display adapter plugged in, run dual displays or have the Displays Preference Arrangement tab open...?
If not, see if an NVRAM reset will clear the problem.
see > How to reset NVRAM on your Mac - Apple Support
If not, try starting up in Safe Mode.
see > Use safe mode to isolate issues with your Mac - Apple Support
Amazing. I've had it for several days and now it's just gone. I'd still be interested as to how it got there and what it was though.
Thanks for the reply den.thed. It was strange. It disappeared as quickly as it arrived. If it does come back I'll follow your advice.
Why do I have a border of a thin red line around my desktop on my iMac?
