Disable the mac start-up sound without having mac os x installed.

Discussion in 'macOS' started by Kolbeinn, May 17, 2013.

  1. Kolbeinn macrumors newbie

    May 17, 2013
    Hello. Is it possible to disable the mac start-up sound without having mac os x installed, from a windows partition or with the mac installation disc?

    I´ve one partition with windows 7. I've tried to disable the start-up sound by booting with the mac os x installation disc to access terminal. The command "nvram systemaudiovolume=%00" works in terminal and when writing "nvram systemaudiovolume" it shows me that system audio volume is set to %00. But the start-up sound is still there.

    Am I doing something wrong? Hope someone can help me.

  2. sOwL macrumors 6502


    Sep 25, 2007
    Nerd Cave
    Not sure about the terminal command, but you should be able to turn the volume all the way down from within the system settings if you don't want to bother with OSX after that. There's also 'Startup Sound' preference pane which you can install to separately control the startup sound without muting system sounds. I have done that on my mac, works even if I put out the OSX drive, it's all in the SMC settings. Mind you, if you reset PRAM the sound will come back as that resets SMC too, so you might need to keep an OSX install handy for when you need it.

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