Operating system: macOS 10.13 or higher. A new version can require a newer macOS - check the current requirement at the website.
To install uDock on your Mac:
Double click on the DMG file which you have downloaded. Drag uDock icon to your Applications folder, or drag and place in a folder of your choosing.
To uninstall uDock from your Mac simply move the uDock icon from Applications folder into the Trash. Before uninstalling, you should quit uDock by right clicking on the uDOck icon and choosing "Quit uDock" from the menu.