MacBook Pro monitor ghosting

Hi there, yw20.

It appears that the wallpaper you're using with your Mac is being seen, even though your applications are covering it. We understand how important it is to have your Mac working as expected, and we're glad to help with this.

How to reset the SMC of your Mac - Apple Support -- If your Mac uses an intel processor, reset the SMC and test.

Reset NVRAM or PRAM on your Mac – Apple Support -- If resetting the SMC didn't resolve the issue, reset NVRAM.

How to use safe mode on your Mac - Apple Support -- If the issue persists, restart your Mac in safe mode. Depending on whether the issue happens or not, refer to the additional steps below:

"If the issue continues in safe mode

If the issue continues while in safe mode, or your Mac restarts several times and then shuts down while starting up in safe mode, you should reinstall macOS and make sure that your Apple software and third-party apps are up to date.

If the issue doesn't continue in safe mode

If the issue doesn't continue while in safe mode, leave safe mode by restarting your Mac normally. Then test for the issue again. The issue might be resolved.

If the issue returns after leaving safe mode, startup items are probably at fault. Apps can install such items in numerous places, and they aren't always easy to find or recognize. For that reason, you should first make sure that you've installed any available updates for your Apple software and third-party apps.

If updating your software doesn't help, try any of these solutions:

• Test your login items.
• To learn whether software in your user account is causing the issue, set up a new user account, then log in to it and try to reproduce the issue in that account.
• Unplug all accessories from your Mac, including printers, drives, USB hubs, and other nonessential devices. You could have an issue with one or more of those devices or their cables.
• Reinstall macOS.

If you still need help, please contact Apple Support."

Take care.