New MacBook Pros lack iconic Mac startup chime, but they do automatically boot when you open the lid

It has been discovered that along with physical function keys, glowing Apple logo and ‘old style’ USB ports, the new MacBook Pros lack the iconic Mac chime when booting up. This is the distinctive noise heard at startup when the Mac passes the initial POST checks; Apple has used the same F-sharp chord sound in its computers since 1998.

The new MacBooks end this tradition as the chime has been removed completely and the machines will make no noise at all on boot, unless there is a fault. However, there seems to be a good reason for this change …

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