jacobw

Silencing macOS PowerChime on Tahoe (26.x): why the old fix stopped working

TL;DR — The widely-documented fix is wrong on current macOS. ChimeOnNoHardware is the real off-switch, and it must be set to true, not false. Setting both keys to false (what every guide from 2015–2022 says) is actually a play-the-chime configuration.

# The fix that works on macOS 26.x:
defaults write com.apple.PowerChime ChimeOnAllHardware -bool false
defaults write com.apple.PowerChime ChimeOnNoHardware -bool true # ← true, not false

jacobw

esphome:
  name: dev4
  friendly_name: BTHome dev4

interval:
  - interval: 5s
    startup_delay: 1s
    then:
      - lambda: |-
          // Update sensor then wait