This article explains how to install a custom screensaver on your Mac. It includes instructions for automatic and manual installations, and information on how to remove a screensaver.
macOS Sonoma: Set Your Own Live Screensaver! [Video Wallpaper on M2]
Apple supplies several screensavers with macOS, but there are also many other programs available from third-party developers.
Most downloadable Mac screensavers are smart; they know how to install themselves. When you’re done downloading a screensaver, you can install it automatically with just a few clicks.
Go to a custom screensaver website, such as Screensavers Planet, and download a Mac screensaver file.