change lock screen background
how to change your lock screen background on a MacBook air
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Hi,
Following tip could help your question.
Step 1: Right-click on the desktop and select Change Desktop Background from the context menu. Step 2: Navigate to the wallpaper or pick in anyone from theavailable album folders as your wallpaper. Step 3: Click on the Apple Menu and select Lock Screen to confirm that the new wallpaper is visible on the lock screen.