Automatic compression
DropSIT chooses the best storage or compression method for each file automatically.
A TekTherapy Labs utility
DropSIT
Classic StuffIt archives, made simple.
Create classic .sit archives on modern macOS, with automatic compression designed for vintage Macintosh compatibility.
DropSITClassic StuffIt archives, made simple.
Automatic · Recommended
Drop files or folders here
DropSIT picks the best compression automatically.
Why DropSIT
Built for the Macs you still use.
Classic compatibility
Validated with StuffIt Expander on classic Mac OS and Mac OS X.
Drag, drop, done
Drop files on the app or its Dock icon and get a classic .sit archive with no extra setup.
Download
Choose the build for your Mac.
Both builds create the same classic StuffIt archives. Pick the one that matches the Mac running DropSIT.
Recommended
v0.13.7
Universal
For Apple Silicon and Intel Macs running macOS 12 Monterey or later.
Apple SiliconIntelmacOS 12+
Download Universal
Older Intel Macs
v0.13.7
Legacy Intel
For older Intel Macs, with support starting at macOS 10.13 High Sierra.
IntelmacOS 10.13+
Legacy Intel
Need help choosing? Use Universal on macOS 12 or newer. Use Legacy on older Intel Macs.
Compatibility
Modern creation. Classic extraction.
DropSIT is designed to bridge modern macOS and vintage Macintosh systems while preserving classic StuffIt archive structure, folders, metadata, and resource forks.
Classic Mac OSMac OS X.sitResource Forks
Keep it alive
DropSIT is free. Support is optional.
If DropSIT saved you time or helped keep a vintage Mac useful, you can support future development. No nags, no locked features.