Wiley Mac OS X Lion Bible 978-1-1180-2376-1 ユーザーズマニュアル

here’s something about the Mac’s startup chime. Most computers 
today play a sound as they start up, but the Mac started the whole 
idea decades ago. And even today, its sound has the right length 

and warmth—not too long, not too loud, and comfortably familiar.

That chime tells you that the Mac has in fact started and that basic hard-
ware elements inside your Mac (hard disk, processor, memory, and so 
on) are all operational. After this chime sounds, Mac OS X tests the Mac’s 
hardware (that’s when you see the gray screen with the Apple logo and 
the spinning-wheel indicator), and then actually loads Mac OS X itself 
(that’s when the screen turns blue). When you see the menu bar at the 
top of the screen and your desktop background has loaded, you know 
Mac OS X is ready to go.

The entire startup—also called boot—process takes about 30 to 45 sec-
onds, depending on the speed of your Mac. Note that on faster Macs, 
some of the events may pass too quickly for you to notice.

You start a Mac running Mac OS X 10.7 Lion in the following ways:

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Press the power button on some Apple Cinema Display LCD 
monitors. Note that on some older models, the power button 
may simply switch the display off; the Apple LED Cinema Display 
does not have a power button.

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