MacChain: A scrolling window manager for Mac. Stop stacking.

Maker here. A few notes on how it works, since this is what I'd want to know:

It's pure Swift on the standard Accessibility API — no SIP changes, no injection, nothing that asks you to weaken system security. That ruled out some approaches, but it means it survives OS updates and you can see exactly what permission you're granting.

Offscreen columns and hidden tab rows get moved rather than minimized, which avoids the genie animation and keeps window state intact. The engine scans every 0.35s while windows are moving and eases out to 1.2s once the desktop is still, so it isn't burning CPU when nothing is happening.

Native fullscreen Spaces are excluded entirely — it leaves them alone. Dialogs, modals and fixed-size windows are excluded too, and there are per-app rules if something needs to float.

Honest about the limits: I've exercised this locally with Accessibility on one display. Much of the behaviour has deterministic self-tests, but a self-test of a layout calculation is not a test of every real app's Accessibility quirks. Apps with strong opinions about their own window size are accepted at whatever size they insist on and the strip lays out around them — I can't claim it's flawless everywhere yet.

There's a free in-browser demo on the site if you want to feel the scrolling before installing anything.

Maker here. A few notes on how it works, since this is what I'd want to know:

Native fullscreen Spaces are excluded entirely — it leaves them alone. Dialogs, modals and fixed-size windows are excluded too, and there are per-app rules if something needs to float.

There's a free in-browser demo on the site if you want to feel the scrolling before installing anything.