If you are looking for how to refresh MacBook, the technique used will depend on what it is that you are looking to refresh. For refreshing a web page, the user needs to press command key (⌘) + R in the browser. In case the MacBook becomes slow, the easiest way to refresh the system is by restarting the computer. It is also possible to close applications that are not in use, upgrade to the latest version of mac OS and free space on the Mac.