They are available in The Unarchiver site. However, if you own an older OS version, you can still use some of the older releases of The Unarchiver.
This is the only requirement for running the latest version of the app. If you decide to use The Unarchiver, make sure that your OS is later than OS X 10.7. They have special sandboxing requirements that restrict the capabilities of the app, claims the developer.
The developer suggests using its website as a download source, because of the limitations set by Apple on the Mac App Store. You can do it on its official The Unarchiver site or the Mac App Store. The first thing you need to do in order to use The Unarchiver is to download it. Easy Way to Use The Unarchiver for Extracting RAR files
