The RAR format optionally splits large files into several compressed parts. This multi-part format makes distributing large business files to or from customers or among colleagues easier, because if ...

When you open a RAR file on your Mac, it will turn into a folder where you can access all of the decompressed files. Visit Business Insider's homepage for more stories.

Occasionally, you'll need to open several compressed files from one ZIP folder. While Windows does a fine job extracting, there are better tools to unzip.