PurrMac — Pet Your MacBook. It Purrs.

Field notes

PurrMac maps trackpad gestures to a small cat-like state machine: slow strokes start a purr, continued contact deepens it, stopping can produce a meow, and hard swipes trigger a hiss. The page specifies a synthesized 22–28 Hz sound, optional recorded or user-supplied audio, and Force Touch pulses at the purr rate. It describes a native Swift menu-bar app for macOS 13 or later, while noting that the public browser demo can only imitate the sound and interaction, not the physical trackpad vibration.