Step 1: Cover unlock risk
Mute right after unlock, before old media state can surprise you.
Read unlock setupMac Audio Safety Landing Page
Prevent accidental speaker playback on Mac automatically
Default0 applies auto-mute at high-risk moments: unlock, output switch, Bluetooth disconnect, Wi-Fi change, and meeting app open. It reduces sudden speaker leaks in meetings, open offices, libraries, and shared spaces.
Step 2: Cover device-switch risk
Mute on output changes and Bluetooth dropouts before fallback to speakers.
Read output-change setupStep 3: Cover meeting-start risk
Use app-open trigger for meeting apps to mute before calls start.
Read app-open setupFAQ
What causes accidental speaker playback on Mac?
Most incidents happen during transitions: unlock, output device switch, Bluetooth drop, Wi-Fi change, or meeting app launch while the previous volume state is still active.
Does Default0 mute the microphone?
No. Default0 is for speaker/output volume protection. It is not a microphone mute manager.
Can I enable only one trigger first?
Yes. Each rule can be enabled independently, so you can start with one high-risk trigger and expand later.