Download zipeg.dmg file and click on it.

(Safari browser will probably do the click step for you)

This will mount Zipeg volume and it will appear in the Finder Window.

Drag Zipeg into your Applications folder and Launch it.

You may want to Ctrl+click Zipeg icon in the Dock Bar and choose Keep in Dock for easy access.

If you do not have Administrator privileges on your Macintosh or you want to keep Zipeg in a different folder - simply create /User/yourUserName/Application folder or alike and drag Zipeg there.

Zipeg will not run from your Desktop or mounted volume - this is done deliberately to protect Zipeg from sudden crashes when Desktop is cleaned up or the volume is unmounted.