Observed arrival · 2026-09-12

Mac Duo Makes Closing a MacBook Look Like a Fold

mac-duo.com Observed source

Editorial interest 85/100 Selection signal · not a rating of the site

A free, open-source macOS utility that keeps the desktop visually fixed as the MacBook lid closes, then brings it back into focus when reopened.

Landing page captured for the 2026-09-12 issue.

Field notes

The effect begins as the lid passes a stated 92° angle and can be adjusted through three preset styles or menu-bar sliders. The page says the hinge signal is sampled 100 times per second, while frames remain on the GPU only for the duration of the animation. Mac Duo is presented as Swift and Metal software with no dependencies, an MIT license, and a version 1.0.0 disk-image download.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

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