Compression ratio results are very dependent upon the data used for the tests. Usually 7zX compresses to 7z format 30-70% better than to zip format, and 2-10% better than most of other zip compatible programs. • 7zX support archives in the proprietary s7z format, which preserves Macintosh resource forks, Spotlight metadata, and other informations which are normally not retained with the regular 7z format • It also supports archives encoded using the AppleDouble standard • It can create self-extracting archives, which will expand on any computer with Mac OS X 10.3 or newer even if the 7zX software isnРІР‚в„ўt installed on the host machine • It can compress archives directly from the Finder contextual menu (requires Mac OS X 10.4)