Press Shift + Command + 5
Choose Record Entire Screen or Record Selected Portion
If recording a portion, drag to select the area
Click Record
Click Stop in...
Click the Apple menu ()
Select System Settings
Click Wallpaper
Choose a wallpaper source (Apple, Photos, or a folder)
Select the wallpaper you want
To set it for a...
Check Activity Monitor for CPU, memory, disk, and network hogs
Quit unnecessary apps
Force quit unresponsive apps
Disable startup/login items in System Settings → General → Login...
Restart your Mac
Update macOS and all apps
Check Activity Monitor for CPU, Memory, Disk, and Network spikes
Quit unused apps and tabs
Close background apps and browser...
Open the Photos app
In the Photos sidebar, create a new album
Select photos to add
Drag-and-drop photos into the album
Use the search bar to find photos...
