disable start up sound - MacBookAir

I often work in the public library or after everyone is asleep at home.

The boot up sound on my MacBookAir is always intrusive.

How do I mute this permanently? I can't think of why I would need it in the future.

OS instructions please, I avoid uploading "stuff" from the internet.

Using OS X El Capitan Ver10.11.4

MacBook Air, OS X ElCapitan Ver 10.11.4

Posted on May 13, 2016 10:28 AM

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disable start up sound - MacBookAir

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