Video of Macintosh System 7.5.5 running on Apple Watch

“Nick Lee, a dedicated programmer with access to WatchOS 2.0, has ported Mac OS 7.5.5 to his wrist,” John Biggs reports for TechCrunch.

“Can the Watch actually run these sorts of programs well?” Biggs reports. “Sure. The Watch’s S1 chip is roughly equivalent to the iPhone 4S’s A5 chip which, as we well know, is plenty fast.”

Biggs reports, “He used Mini VMac, an ‘early Mac emulator,’ and recompiled it for the Watch.”

Read more in the full article here.

MacDailyNews Take: Ironically, System 7.5 introduced the clock in the Mac’s menu bar.

Now, Nick, get it to run in landscape mode. Hey, does anyone have an ultra-fine stylus?


  1. As slow as I remember 7.5.5 to be when it was on a real Mac.
    The thing that I didn’t realize was that OS7 was first introduced in 1991 and was only replaced by OS8 in 1997. It’s no wonder that Win95 kicked butt.
    We have to be very thankful that Steve came back when he did. Otherwise I would probably be typing this on an IBM Thunkpad and obviously not to a Apple centric website.

  2. An Apple IIgs emulator would be a better “fit.” Lower resolution screen, bright colors, single-tasking… Anyone out there who owned an Apple IIgs knows it would look really cool on an Apple Watch (better than early Mac OS). Crystal Quest on the wrist 🙂

    1. Agreed. In the history of Mac OS, v7.5.x was an abomination. It didn’t get good again until 8.1. Meanwhile, Apple was bumbling around attempting to get Copland and Gershwin OS to actually work, which they never did. Bits of those projects were put into Mac OS 8 and 9.

      1. Agree too. System 7.5.5 was the most unstable version of System 7. Back then loading all those buggy extensions and control panels was required to get any work done. Microsoft extensions were the worst.
        When Steve & crew stepped in they came out with System 7.6. A stable bug fix for 7.5.5 but Steve needed to charge for it because Apple needed the cash to stay afloat. As an unfortunate result, not many people bought it because Mac users weren’t use to paying for system upgrades.
        When Apple bought NeXT, people, and Gil Amelio, didn’t realize how long it would take to get what would later be called OS X out the door. Fortunately Steve took the time needed to get it right pacifying us very successfully with OS 8, 8.5 and 9.

  3. System 7.5 was the most unstable OS that Apple has ever produced. Oddly enough System 7.6 was incredibly stable, more than any of the old OS through OS 9. OS X of course changed the game.

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