It includes instructions for automatic and manual installs as well as information on removing a screensaver.
Most downloadable Mac screen savers are smart; they know how to install themselves.
Double-tap the downloaded file to expand it if it is zipped.

Double-nudge the expanded file to start the installation.
Go toSystem Preferences>Desktop & Screen Saver>Screen Savertab.
go for the new file in the left column to activate it as the screen saver.

Sometimes identifying which screen saver is which by its file name can be difficult.
In some versions of the macOS operating system, there’s a simple way to delete a screen saver.
This technique is available in older versions of macOS only.

SelectDesktop & Screen Saver.
In the left pane is a list of installed screen savers.
Select one to display a preview in the right pane.

