If it is otherwise working fine, you might try hitting
the Volume up and or mute buttons at the top of the number pad
during the time it should be playing this chord to see if you
might have accidentally muted it or turned it down. At least on
some Mac versions such as the Mac Pro, Voiceover remembers
different audio settings for the startup sequence than it does
when it finishes starting up and you have your desktop.
If, for example, you had gotten the startup audio
somehow routed to the bluetooth device, muted or turned all the
way down, you might not hear anything at all until your desktop
starts.
One good thing is that it is almost surely a software
configuration issue since it is consistent.
I discovered this accidentally one day on a Mac Pro.
This particular Mac has a tiny internal speaker that plays the
startup music and any voiceover speech that occurs when the
system has no users actually logged in. It was too faint to
understand VO so I pressed the Volume Up key on the number pad
with the idea of turning it back down when the speakers came on.
The internal speaker got louder but this didn't change the
main speaker volume when it finished booting and the desktop came on.
The system remembers this new setting over reboots, power downs,
etc so if one were to turn it all the way down, you would still
have a working desktop with VO, but no startup music nor
Voiceover when it wasn't you that was logged in. Basically, each
mode of operation has its own sound profile that the Mac appears
to store in some non-volatile way such as a file it always saves
or maybe non-volatile memory, but it tries to remember how your
sound and Voiceover were set even after an upgrade.
So, when your Mac is booting or you were to log out of
your session, a different sound profile rules until you are back in
your desktop again.
Martin
Paul Hopewell writes:
> Hello,
> For some time my iMac has stopped playing the chord it used to play
> shortly after being switched on. I had hoped that upgrading to Lion
> 10.7.3 would fix this but alas not. Any ideas on how I can restore that
> useful chord?
> Many thanks.
>
> Paul Hopewell
>
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