What Is a .Z File and Where Does It Come From?
Files with the .Z extension were compressed using the original Unix compress command, which uses the LZW (Lempel Ziv Welch) algorithm. Unix compress was the standard compression tool on Unix systems from the 1980s until gzip replaced it in the early 1990s. The .Z format produces larger compressed files than modern alternatives like gzip, bzip2, or LZMA. Users encounter .Z files when accessing old FTP archives, legacy Unix system backups, and historical software distributions.
How Do You Decompress a .Z File on Mac?
Drag the .Z file onto UnFox. The app detects the LZW compression header and decompresses the file to your chosen destination. macOS may also handle some .Z files through Archive Utility, but behavior varies by macOS version. UnFox provides consistent decompression with progress tracking across all supported macOS versions.
Unix compress (.Z) is one of 36 formats UnFox supports, covering both legacy and modern compression types. all supported compression formats for Mac, iPhone, and iPad.
UnFox handles legacy compression formats with the same drag and drop interface used for modern archives. archive extraction features for Mac, iPhone, and iPad.