Mac users interested in Unarchiver osx 10.6 generally download:
The Unarchiver is a program designed for Mac users who wish to have access to more file compressing features than the ones offered by the Mac default Archive Utility app. This application supports a wide variety of archive formats and integrates seamlessly with the Finder tool.
Mac OS X comes with a default file compression utility. You can use it to create and extract archive files on your computer. Unfortunately, the program supports a very small amount of archive formats. For this reason, applications like RAR Extractor Lite were created.