While Windows users can access 7z files by using the format’s native decompression utility 7-Zip, the program lacks an official Mac release. Apple aficionados need not despair, however: The 7z format can be opened by a bevy of compression apps on OS X, most of which are free. In addition to decompressing these files, these apps can also compress files on your Mac into a 7z file, as well as opening other archive formats.
