How to change the lock screen wallpaper on mac

On your Mac, choose Apple menu
> System Preferences, click Desktop & Screen Saver
, then click Screen Saver.
Table of Contents Show
Open the Screen Saver pane for me
Click the “Show screen saver after” pop-up menu, then choose how long you want your Mac to wait before starting the screen saver when it’s idle.
A warning symbol indicates if your display is set to turn off (as specified in Energy Saver preferences or Battery preferences) before the screen saver starts.
On the left, click a screen saver, then on the right set options for it.
The options available vary depending on the screen saver you select.
- Source: Click the pop-up menu, then choose the pictures to show in the screen saver. You can use pictures that come with macOS or choose pictures from your Photo Library or another folder.
  The preview area shows how the screen saver will look; give it a moment to preview your selection. To check how the screen saver looks full screen, move the pointer over the preview area, then click Preview. To stop the screen saver and return to the preference pane, move the pointer.
- Shuffle slide order: Select the checkbox to show pictures in a random order instead of their order in the source.
- Screen Saver Options: Click to set options for color, speed, and more.
Set options for when to show the screen saver.
- Use random screen saver: Select the checkbox to let macOS choose which screen saver to use.
- Show with clock: Select the checkbox to show the time in the screen saver.
- Hot corners: Click to set a hot corner shortcut for quickly starting the screen saver whenever you need it.

Hello

Please help me to change the grey background of the LOCK SCREEN for a custom picture.

(iMac 2010 w/ High Sierra)

The LOCK SCREEN comes to ask for the password after you select "Lock Screen" from the menu or to access the Desktop after it's locked automatically after certain time or an active screen saver.

The LOCK SCREEN has no Power Off button, and has a plain grey background.

THIS IS THE -LOCK SCREEN-

The LOGIN WINDOW instead, has a blurry version of the Desktop picture. And often confused with the LOCK SCREEN.

It shows either when one chooses from the drop down Fast User Switching menu or the menu > Log Out <User>

THIS IS THE -LOGIN WINDOW- (before and after you select the user to Login)

I have managed to change the the background of the LOGIN WINDOW for one of my liking (same desktop picture but not blurry) just by switching the file /Library/Caches/com.apple.desktop.admin.png

But changing the background of the LOCK SCREEN has been a huge challenge. I haven't found any information on internet on how to accomplish this.

It's been asked many times here and elsewhere, yes, but not answers or not relevant answers, as they often refer to the LOGIN WINDOW, not to the LOCK SCREEN.

I hope that asking (again), but in detail, can bring an answer to this query.

Is there a way to change the LOCK SCREEN grey background for a custom picture?

(Preferable: doesn't require a 3rd party app - Required: not disabling permanently SIP)

Thank you very much in advance.

A lock screen or screen lock has a crucial influence on protecting your Mac's data security. With it on your Mac, you can be sure no one will get into your work documents, your personal info like photos and videos, and other important data.

The screen lock not only helps you protect your information, but also it can be customizable to make logging into your user more fun. And this post will guide you on how to change the lock screen on Mac in detail. If you have interests, just keep reading.

Table of Contents:

1. How to resize an image for the Mac lock screen?
2. How to change the lock screen on Mac?
3. How to set your lock screen message on Mac?
4. How to disable the Mac lock screen?

How to resize an image for the Mac lock screen?

First things first, you need to download the picture you want as your lock screen background. Then, you need to resize it to fit the MacBook lock screen dimensions. Do the following to resize the picture for the Mac login picture:

How to change the lock screen on Mac?

When you finished resizing the image, you'll need to save it in the Caches folder. Then, you'll be able to set it as the lock screen of your Mac.

If you're not asked to replace the image, save it as "lockscreen.png". Then, in the Caches folder, open the Desktop Pictures subfolder, then open the folder inside and paste the image there.

How to set your lock screen message on Mac?

After changing the Mac login screen picture successfully, another thing you can do is to add a message to it. You can write something fun for yourself, maybe a quote from a favorite writer or a movie. And the process of setting a lock screen message on Mac is pretty simple, just follow the steps:

From the menu bar, click on the Apple logo.
Go to System Preferences > Security & Privacy.
Click on the lock located at the bottom left corner of the window.
Enter your Mac password and click on Unlock or use your Apple Watch to unlock.
In the General tab, check the box next to "Show a message when the screen is locked" and click on the Set Lock Message button.
Then, type in your message and click on OK.

Then you can lock your screen, and you'll see the messages at the bottom of the lock screen.

How to disable the Mac lock screen?

Lock Screen helps protect the data on your Mac, but if you need to disable the Mac lock screen for your own reason, here's how to do it:

From the menu bar, click on the Apple logo.
Still, go to System Preferences > Security & Privacy.
Click on the padlock located at the bottom left corner of the window.
Enter your Mac password and click on Unlock.
In the General tab, uncheck the box next to Require password.
When asked if you're sure you want to turn off the screen lock, click on Turn Off Screen Lock.

Anna Yuan

Anna Yuan is a professional tech editor at iBoysoft who specializes in writing articles related to software, macOS, Windows OS, Apple products, and Windows computers. Furthermore, she writes articles for some well-known tech websites. And as she has been a Mac user for many years, she's highly willing to share information on Mac utilities and tips.

Jessica Shee

Jessica Shee is a senior tech editor at iBoysoft. Throughout her 3 years of experience, Jessica has written many informative and instructional articles in data recovery, data security, and disk management to help a lot of readers secure their important documents and take the best advantage of their devices.