StuffItCore
StuffItCore is a framework component used by StuffIt, the compression and archive utility for macOS. It provides the underlying compression, decompression and archive-handling functionality for the StuffIt application, which lets users create, extract and manage ZIP, RAR, 7Z, and legacy StuffIt format archives. StuffItCore is not installed or used separately — it is bundled as part of the StuffIt application itself.
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1 suggestionStuffItCore is a framework component embedded within the StuffIt application, not a standalone product. To ensure it runs natively on Apple Silicon, you need to update StuffIt itself to the latest version. Check the StuffIt vendor website or launch StuffIt and use its built-in update mechanism (typically Help → Check for Updates) to download the current native build. If StuffIt has not yet shipped a native Apple Silicon build, contact the vendor to confirm their timeline — the Intel-only version will stop working entirely when Apple removes Rosetta 2 in macOS 28 (September 2028).
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