If you have a whole roomful of Macs, it’s probably better to turn the chime off in the NVRAM, but in the past some sysadmins resorted to gluing audio jacks into headphone sockets to stop users from enabling the startup chime. That should trick your Mac into thinking that headphones are connected, and mute its internal speakers. The easiest way to mute the chime when you need to is to put a blank audio jack plug into the headphone socket, where your Mac has such a socket. Thank you to Michael Bach (comment below) for reminding me to point that out, although I can’t think why anyone would ever want to do it □ To turn off the startup chime, open Terminal and type You should now hear that warm, reassuring chord every time your Mac starts up, until you next reset your NVRAM, after which you’ll need to repeat the process of turning it back on. Then close Terminal, and try restarting your Mac. You’ll be prompted for your admin user password, which you should type in and press Return again. To turn on your missing startup chime, open Terminal and type ![]() ![]() This sets the StartupMute parameter instead. Thanks to for discovering the new secret way to enable this, which works even with the iMac Pro and MacBook Pro 2019 16-inch. Although once a plague in labs and classrooms, there’s something deeply emotive about that chord.įor some time, this could be re-enabled on muted models by setting the BootAudio parameter to 01, but that stopped working in models released from about 2017. One feature that many users miss on more recent Mac models is the startup chime.
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