How do I turn down the Mac startup sound
Well I have a 3 weeks old iMac 27" Retina. Awesome piece of art! That said, the start up sound is very loud and from what I've found out from searching the old inter-web one can not turn down the volume. Hard to believe I want to turn something down but....Well I need to keep the peace in the homestead.
I did see I could download some kind of third party stuff but I really want to avoid that.
Are there any of you guru's out there that can enlighten me?
Thanks,
tom
iMac with Retina 5K display, OS X Yosemite (10.10.2)