how to change mac background lock screen

Restart your Mac, and now you will see that your login wallpaper is changed. Wait until the Terminal app completes the process.ġ1. Now copy and paste the heic image that we created (step # 2) in here (System > Library >Desktop Pictures)ġ0. Again open the Terminal app and enter the following code and hit enter: diskutil apfs updatePreboot / Find Catalina.heic and rename this file like Catalina-original.heic, (just in case if you want to change it back).ĩ. Now go to Finder, click Go and then Go to Folder and enter /System/Library and click Go.Ĩ.

Again, in Terminal enter the following command and press enter: sudo mount -wu / killall FinderĦ. if you do not know this, open Disk Utility (Applications / Utilities or you can use Spotlight) and select your disk (sidebar) and then click the Info icon.ĥ.

Make sure that you replace ‘disk1s5’ with the identifier for your system. When your computer restarted, open Terminal (Applications / Utilities or you can use Spotlight) and enter the following command and hit enter: sudo mount -t apfs -wu /dev/disk1s5 /Volumes Restart your Mac by going to the Apple menu and Restart.Ĥ.In terminal enter the following command and press enter (this will turn off System Integrity Protection).After starting up from macOS Recovery, click Utilities (from the top menu).You will be asked to enter your password.Keep these keys when you see a login or the recovery mode screen. Turn on your Mac and immediately press and enter the Command (⌘)-R keys.Do not worry we will re-enable it after we are done. Now we will disable System Integrity Protection. You can rename it by selecting it and hitting the ‘return’ key and entering this new name.ģ. Rename this file as Catalina.heic ( HEIC files) Your image can be a JPG or PNG (the most common types).Ģ. There are different types of image formats. Just make sure that you can easily find it as we will need this later. Save this image anywhere you want on your computer (e.g, Desktop etc). You can modify using the Preview app or using any other photo editing apps. Find or create the image you want to use. You may want to do this so that you do not have to stare at the generic Catalina image every time you type in your password.ġ. It seems that it is a little harder to change this background image for the login screen wallpaper now but it is still possible. We previously wrote about how you can change the login screen image in macOS Mojave. You can change the login screen wallpaper image that appears when you start your Mac to any image you want to use.

How to change mac background lock screen