However I also think it is incredibly annoying, and Apple should allow local admins to change the System lock screen, but perhaps they have security or technical limitations that make it infeasible. Users should not automatically see other peoples lock screens either after a restart, they are private by default like your Documents, Downloads and Browser History. All UI customizations are at the User level, not System level.
If you think about the way an OS is organized, this makes sense. It will also appear if you select Login Window from your profile pic on the upper right menu bar, or Switch User from your lock screen. Choose a folder of pictures on the left and then you can right-click on one of the image to set it as the wallpaper. Hit on the tab of Desktop & Screen Saver and then find the option of Desktop.
#How do you change wallpaper on macbook air mac#
The System lock screen will appear when you restart a machine with MULTIPLE users because the OS has no idea which user is about to login. Click on the Apple menu icon on Mac Air and then select System Preferences option to tap on. It will also appear on restart if you only have ONE user profile. This screen appears when lock your computer. This article is about the User lock screen image. There is USER one that you can change, and a SYSTEM one that you cannot (easily). There are TWO lock screen images, which this article does not make clear. type: mv /Volumes/Macintosh\ HD/Big\ Sur\ Graphic.heic /Volumes/Macintosh\ HD/System/Library/Desktop\ Pictures/Big\ Sur\ Graphic.heic type: mv /Volumes/Macintosh\ HD/System/Library/Desktop\ Pictures/Big\ Sur\ Graphic.heic /Volumes/Macintosh\ HD/System/Library/Desktop\ Pictures/Big\ Sur\ ġ5. type: cd /Volumes/Macintosh\ HD/System/Library/Desktop\ Picturesġ4. copy your own grafic image in to Macintosh HDĪttention!!!! X=your Big Sur disk from 'diskutil list'ġ3. name your own grafic image as Big Sur Graphic.heicĨ.
Desktop & Screen Saver setting has two tabs for settings up Desktop wallpaper and screen saver on your Mac. Click on the Desktop & Screen Saver option. With some 25,000 images and new collections monthly, you wont run out of HD backgrounds even if you set a fresh one daily. This will open a dialog box showing all system setting icons. Now the Big Sur volume should be writableħ. Go to Apple menu > System Preferences section. Found the answer, apparently /System/Library/Desttop Pictures/Big Sur Graphi.heic is where the login screen background loads from.Īttention!!! X=your Big Sur disk from 'diskutil list'