WinRAR is a helpful software that you can download on your Mac computer. It's used for compressing, packaging, and backing up files stored on your device. This program helps to make folders smaller so they can be shared easily via email or other sites with size limits. WinRAR for Mac also allows users to encrypt data and create new RAR files. There's a free 40-day trial period available with this software, making it versatile for various file types including movies, photographs, music documents and more. However, the macOS version of WinRAR doesn't come with a user interface; instead, it uses command-line design which can make beginners find its usage difficult. For people new to this kind of software, alternatives like WinZip or The Unarchiver might be better options.