In the pop-up window, enter /Library/Caches and click Go. With your file ready, open Finder and go to Go > Go to Folder.
The resulting file name must be exactly as follows: Then at the top, give the file this name:. First, choose PNG from the Format menu at the bottom of the window. To do so, open Preview and go to File > Save As. Your Mac's resolution is listed on the Displays tab.Īfter you find and download an image you want to use, you'll need to convert it to a PNG file format. To check the resolution of your display, click the Apple button in the top-left corner and choose About This Mac. Add your own lock-screen wallpaperįor best results, you'll want to find an image that is the same resolution as your Mac's display or resize a larger image to your Mac's resolution. Lastly, you can change the user icon for your account and any other accounts you have set up on your Mac. You can also add a message to your lock screen, which can add a bit of fun, motivation or information to your Mac after you log out. If you have grown tired of this look, then you can add your own wallpaper. Apple's standard lock-screen image with OS X El Capitan (and Yosemite before it) is a blurred version of your desktop wallpaper.
