Most of the time, uninstalling is this simple: Also, a new version of a program may not work correctly unless you get rid of the old one. Applications take up space on your hard disk and can slow your computer. Why would you want to uninstall a program? For the same reason you occasionally tidy your office or clean your garage. If you are used to the uninstall option in Windows, you have a little culture shock - macOS does not have this feature built in. Sometimes, though, applications store the files they need to run in other locations on your computer's hard drive, and finding them can take some detective work. In many cases, all you have to do is drag the application's icon to the Trash. Removing programs from a Macintosh can be very easy. Apple unveils a new MacBook Air during an Apple launch event at the Brooklyn Academy of Music on Oct.