As an entire computer that fits on our wrists, the Apple Watch already seems like something out of a science fiction novel, but a new video from software developer Nick Lee demonstrates just how far computing has come in the last two decades.

Lee's hacked an Apple Watch running watchOS 2 to run a port of a 20-year-old Macintosh OS, System 7.5.5, using the Mini vMac Macintosh emulator.


When System 7.5.5 was released in 1996, it required a full PowerPC-based Mac to run, and in their smallest incarnation, those machines were clunky, heavy, and pretty far from the portable devices that we have now. Today, that same operating system can run on a tiny 38mm to 42mm wrist-worn computer.

Top Rated Comments

Menopause Avatar
138 months ago
Am I a bad person to find this to be a pointless waste of time? Just my humble opinion.. why do people do this? Run haggy old OS on new devices and announce it? Yes, software is much more efficient today and hardware is minimalistic compared to 20 years back. Also, bears crap in the woods. So? Please feel free to join in and bash my existence if you disagree.
Score: 14 Votes (Like | Disagree)
AngerDanger Avatar
138 months ago
@Menopause, I'm a worse person for only being able to focus on the bloody portrait video!
Score: 13 Votes (Like | Disagree)
Dayv Avatar
138 months ago
Am I a bad person to find this to be a pointless waste of time? Just my humble opinion.. why do people do this? Run haggy old OS on new devices and announce it? Yes, software is much more efficient today and hardware is minimalistic compared to 20 years back. Also, bears crap in the woods. So? Please feel free to join in and bash my existence if you disagree.
Your existence is terrible.
Score: 12 Votes (Like | Disagree)
Slix Avatar
138 months ago
While incredibly useless in practice, the idea of it is very cool. We've come a far way! :D
Score: 10 Votes (Like | Disagree)
Ingot Avatar
138 months ago
('https://www.macrumors.com/2015/06/22/apple-watch-runs-20-year-old-mac-os/')


As an entire computer that fits on our wrists, the Apple Watch already seems like something out of a science fiction novel, but a new video from software developer Nick Lee ('https://twitter.com/nickplee') demonstrates just how far computing has come in the last two decades.

Lee's hacked an Apple Watch running watchOS 2 to run a port of a 20-year-old Macintosh OS, System 7.5.5, using the Mini vMac Macintosh emulator ('http://www.gryphel.com/c/minivmac/').



When System 7.5.5 was released in 1996, it required a full PowerPC-based Mac to run, and in their smallest incarnation, those machines were clunky, heavy, and pretty far from the portable devices that we have now. Today, that same operating system can run on a tiny 38mm to 42mm wrist-worn computer.

Article Link: Video of 20-Year-Old Mac Operating System Running on an Apple Watch ('https://www.macrumors.com/2015/06/22/apple-watch-runs-20-year-old-mac-os/')
Just to add to the pointless discussion, why do this? Because we can. The cool factor in my mind is through the roof. In a few years snow leopard will run on the watch.
Score: 10 Votes (Like | Disagree)
Analog Kid Avatar
138 months ago
Kudos on proper use of portrait video! Perfect for mobile viewing, ideally suited to the Watch's own portrait display, and elegantly showcasing the chosen strap style.
The chosen strap style remains the same from beginning to end. If something doesn't change, there is no reason to use video to capture it.

Capturing the strap wasted half of the available horizontal field of view even in portrait, and then wastes about 75% of the landscape viewing area on my display when played back.

Portrait video: always wrong
Score: 9 Votes (Like | Disagree)

Popular Stories

iphone 17 models

No iPhone 18 Launch This Year, Reports Suggest

Thursday January 1, 2026 8:43 am PST by
Apple is not expected to release a standard iPhone 18 model this year, according to a growing number of reports that suggest the company is planning a significant change to its long-standing annual iPhone launch cycle. Despite the immense success of the iPhone 17 in 2025, the iPhone 18 is not expected to arrive until the spring of 2027, leaving the iPhone 17 in the lineup as the latest...
duolingo ad live activity

Duolingo Used iPhone's Dynamic Island to Display Ads, Violating Apple Design Guidelines

Friday January 2, 2026 1:36 pm PST by
Language learning app Duolingo has apparently been using the iPhone's Live Activity feature to display ads on the Lock Screen and the Dynamic Island, which violates Apple's design guidelines. According to multiple reports on Reddit, the Duolingo app has been displaying an ad for a "Super offer," which is Duolingo's paid subscription option. Apple's guidelines for Live Activity state that...
Clicks Communicator Feature

'Clicks Communicator' Unveiled — Will You Carry This With Your iPhone?

Friday January 2, 2026 6:35 am PST by
The company behind the BlackBerry-like Clicks Keyboard accessory for the iPhone today unveiled a new Android 16 smartphone called the Clicks Communicator. The purpose-built device is designed to be used as a second phone alongside your iPhone, with the intended focus being communication over content consumption. It runs a custom Android launcher that offers a curated selection of messaging...
Low Cost MacBook Feature A18 Pro

Low-Price 12.9-Inch MacBook With A18 Pro Chip Reportedly Launching Early This Year

Friday January 2, 2026 9:08 am PST by
Apple plans to introduce a 12.9-inch MacBook in spring 2026, according to TrendForce. In a press release this week, the Taiwanese research firm said this MacBook will be aimed at the entry-level to mid-range market, with "competitive pricing." TrendForce did not share any further details about this MacBook, but the information that it shared lines up with several rumors about a more...
Low Cost A18 Pro MacBook Feature Pink

Apple's 2026 Low-Cost A18 Pro MacBook: What We Know So Far

Friday January 2, 2026 4:33 pm PST by
Apple is planning to release a low-cost MacBook in 2026, which will apparently compete with more affordable Chromebooks and Windows PCs. Apple's most affordable Mac right now is the $999 MacBook Air, and the upcoming low-cost MacBook is expected to be cheaper. Here's what we know about the low-cost MacBook so far. Size Rumors suggest the low-cost MacBook will have a display that's around 13 ...
Apple Fitness Plus hero

Apple Announces New Fitness+ Workout Programs, Strava Challenge, and More

Friday January 2, 2026 6:43 am PST by
Apple today announced a number of updates to Apple Fitness+ and activity with the Apple Watch. The key announcements include: New Year limited-edition award: Users can win the award by closing all three Activity Rings for seven days in a row in January. "Quit Quitting" Strava challenge: Available in Strava throughout January, users who log 12 workouts anytime in the month will win an ...
govee floor lamp

CES 2026: Govee Announces New Matter-Connected Ceiling and Floor Lights

Sunday January 4, 2026 5:00 am PST by
Govee today introduced three new HomeKit-compatible lighting products, including the Govee Floor Lamp 3, the Govee Ceiling Light Ultra, and the Govee Sky Ceiling Light. The Govee Floor Lamp 3 is the successor to the Floor Lamp 2, and it offers Matter integration with the option to connect to HomeKit. The Floor Lamp 3 offers an upgraded LuminBlend+ lighting system that can reproduce 281...