Handling RAR files on Mac can be quite common, so you need a solution to extract them quickly and easily. I've found RAR Expander to be such a program. Open up your archive with the program and it will take care of the rest. It's most important feature is handling multi part archives, quite useful when you're expanding a file containing multiple video parts for example. RAR Expander will also work with password protected files, but you'll have to make sure you remember your password before expanding.

The real downside to using RAR Expander is that it is exclusively limited to the RAR format. While this is one of the most common formats you'll come across, it's a shame that the program doesn't let you expand other popular formats like Stuffit Expander does. Users have also been known to prefer unRarX, which effectively restores corrupted archives, something that RAR Expander doesn't seem to handle.

RAR Expander is a simple, no-fuss solution to expand RAR archives on Mac.