The best rar file opener that works on Windows and Mac?

The Unarchiver is definitely a solid choice for a RAR file opener on Mac! It's really popular and gets the job done without any fuss. Here’s the lowdown based on what I've seen and heard from others:
Pros:

• Simplicity: The Unarchiver is super easy to use. You basically just drag your RAR file onto the app, and it takes care of the rest. No complicated menus or settings to mess with.
• Handles Passwords: It can deal with password-protected RAR files, which is a nice bonus if you’re working with secured archives.
• Integration: It integrates nicely with Finder, so you can just right-click a RAR file and choose to open it with The Unarchiver. That makes it feel really seamless as part of your Mac experience.
• Lightweight: It’s free, and it doesn’t take up a lot of space or resources on your computer.

Cons:

• Limited to Mac: If you're ever on a Windows machine, you’ll need to find another RAR file opener
   tool since The Unarchiver is only available on Mac. This could be a hassle if you find yourself switching between OSes a lot.
• Relying on Updates: Sometimes, it might lag behind in supporting the latest RAR file formats. While it usually keeps up pretty well, there could be times when you hit a snag with a particularly new or complex archive.
• Basic Features: It’s not as feature-rich as some other RAR file opener tool. If you’re looking for more advanced options (like file compression or sophisticated management tools), you might find it lacking.