oneko
A little cat that chases
your cursor.
Natively.
The classic oneko, ported to Swift/AppKit. No Electron, no network access, no permission prompts — a 320 KB menu-bar app that does one thing well.
$ brew install --cask
oneko-swift/tap/oneko
or download the app · first-launch notes
🐈 The cat on this page is real — move your mouse. On your Mac it chases the cursor across every app and screen.
Simple, like software used to be
Everything lives in a menu-bar icon. No settings window, no onboarding, no Dock icon, no updater phoning home. Just the cat.
Truly native
Pure Swift/AppKit. One 100 ms timer drives everything; when the cat sleeps or hides, it costs exactly zero.
Above everything, in the way of nothing
A click-through, transparent overlay: the cat renders over every app — including full-screen apps, on all Spaces — and never intercepts a click.
A faithful port
The original state machine, intact: 8-direction runs, the startled alert, face-washing, wall-scratching near screen edges, and dozing off when you stop moving.
Multi-monitor done right
Chases across displays, handles mixed Retina setups, and can be locked to one screen — a lock that survives docking, unplugging and reboots.
Horizontal-only mode
Pin the cat to a row along the top or bottom edge, following only your cursor's x — like the original strip-of-desk cat.
Private by construction
No network access, no analytics, no accessibility
permissions. Open source, and
./build.sh rebuilds the whole app in
seconds.
27 skins
The classic cat and dog, the original X11 characters, and 21 sheets of community pixel art. Click one — the cat on this page will change too.
Scriptable, if you want it
Anything that can open a URL can control Oneko — Apple
Shortcuts, Raycast, or open in a script.
There's also a
Raycast extension
with toggle, skin picker, speed and quit commands.
| URL | Effect |
|---|---|
oneko://show / hide /
toggle
|
Show or hide the cat |
oneko://skin/sakura |
Switch the sprite |
oneko://speed/fast |
Set the chase speed |
oneko://quit |
Quit the app |