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Classic Mac

  • A 1991 Floppy, Mounted in macOS 27

    A plain 1.44 MB floppy from 1991 went into a USB drive on a Mac running macOS 27, and a few seconds later it was on the desktop with its System 7 icons. The Mac stopped reading HFS in 2019; here's how we taught it again.

    1 October 2026·6 min read·Software

  • The Yardstick

    In 1985 the Mac, the LaserWriter and PageMaker turned one desk into a publishing studio. Desktop publishing asks more of software than anything else, so every kit we build is now designed against it.

    30 September 2026·7 min read·Software

  • Old Over New

    A brand-new Mac cannot read a disk made by an old one. Rather than slide something new underneath an old machine, we are teaching the modern Mac everything the old one knew, one shared kit at a time.

    26 September 2026·9 min read·Software

  • Nobody Wrote It Down

    StuffIt — the archive format that essentially every Macintosh file passed through between 1988 and 2005 — has no specification. There are millions of .sit files in the world, and no document that says what one is.

    12 August 2026·10 min read·Software

  • The Files You Cannot Type

    There is a file on your old Macintosh disks that you have almost certainly never seen, cannot create, cannot rename, and have probably destroyed. It is called Icon, and it ends with a carriage return.

    11 August 2026·9 min read·Software

© 2026 Insanely Digital. Dedicated to the restoration of vintage Apple computer technology.

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