StuffIt
StuffIt is a framework component that provides file compression and archiving functionality to StuffIt Deluxe and StuffIt Expander on macOS. StuffIt has been a cornerstone of Mac file compression since 1987, handling the StuffIt proprietary compression format along with standard formats like ZIP, GZIP, and TAR. The framework is bundled within the StuffIt application suite and is not separately installed or updated.
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1 suggestionStuffIt was discontinued by Smith Micro Software several years ago and is no longer actively maintained. The SDK framework component you have is part of a defunct product line and cannot be updated independently. Since StuffIt Deluxe and StuffIt Expander are no longer supported by the developer, there will be no native Apple Silicon update for this framework — and with Apple removing Rosetta 2 in macOS 28 (September 2028), any StuffIt installation will stop working entirely on that release. For everyday file compression and decompression needs, macOS itself now includes built-in support for ZIP, GZIP, TAR, and other common formats via Archive Utility (included with every Mac). For more advanced archiving, consider The Unarchiver (free, Mac App Store or direct download, natively supports Apple Silicon) or Opus One (paid alternative, also native). Both can handle the formats StuffIt once dominated.
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