Hello thanks for the feedback.
The reason I lose sound in the 3.5mm jack is a bit of a mystery. It is
the second time this has happened and only a re-install resolves the
issue. If you go into system preferences and consult the output tab the
device has completely disappeared with only internal speaker showing as
a device. It is almost as if the Mac has forgotten that it has the audio
outputs.
I have no special drivers to redirect output like sound Flower so I
do not think there is anything my apps have done to settings which would
cause this. Anyway it is not as if an output device has been disabled,
it has actually completely disappeared with the Mac not being aware of
it for some reason. If anybody knows of a way to force the Mac to look
for Hardware again and re- recognise its own hardware I would be glad to
hear.
As soon as I am in Recovery Console sound returns to the audio ports
so it is clearly something being screwed up by the OS.
The last time this happened was when I was running Lion so this is not,
hopefully, going to be a frequent issue.
The other weirdness in Yosemite sound is that occasionally for no
apparent reason the balance gets shifted away from 50% to something like
77%. I have seen others report this as well. This can be easily
rectified in system preferences but why it should happen in the first
place is a bit of a mystery also.
David Griffith
On 14/12/2014 09:03, M. Taylor wrote:
Hello David,
First, let me say that I am so sorry you had to go through all of that just to
get back up and running.
Second, I am wondering why you lost sound in your 3.5 earphone/microphone jack.
If you don't track down the cause, or at least an easier solution, you may
have to deal with such an issue in the future.
I'm curious: did you check your audio output settings in system preferences or
in the application-specific preferences before resorting to reinstalling the
OS? I'm almost certain you did but just wanted to ask.
A month or so ago, I removed and reinstalled several versions of Audio Highjack
Pro. A couple of days ago, I was helping a friend test Skype and discovered
that, while the built-in microphone worked, when I plugged in my Apple wired
headset, she could not hear my voice. As it turned out, I discovered in Skype
Preferences that one of my audio settings had been switched to Sound Flower.
Thinking back, I do remember experimenting with Sound Flower back when I was
working with Audio Hijack Pro. I was so glad I first checked the audio
settings in Skype before uninstalling the application.
As for the recovery partition:
A couple of months ago, I purchased a 13 inch, mid-2014, MacBook Pro with
Retina display. The machine came with Maverick.
I subsequently updated it to Yosemite. Before making a Yosemite install USB
Drive, I had need to re-install Yosemite using the Recovery partition.
Upon using the startup key combo of Command+R, and of course starting VoiceOver
after system Startup, I was given the option of re-installing Yosemite and only
Yosemite.
Now that I think about it, again, before making a USB Yosemite install key, I
performed the same steps on a friend's MacBook Air which, like my Pro, had
originally shipped with Maverick, and was able to re-install Yosemite from the
Recovery partition.
Now, of course, I have a Yosemite install key so have no need to use the
Recovery partition but, for me and my friend, at least, the Yosemite Recovery
partitions performed as expected.
After doing a little research on this, a few minutes ago, I learned that
Recovery Partition mileage may vary depending upon when the Mac was purchased
and the type of Mac in question.
Mark
-----Original Message-----
From: macvisionaries@googlegroups.com [mailto:macvisionaries@googlegroups.com]
On Behalf Of David Griffith
Sent: Saturday, December 13, 2014 6:02 PM
To: macvisionaries@googlegroups.com
Subject: Saga trying to reinstall Yosemtie
I report this as a cautionary tale.
Tonight I suddenly lost sound output from my 3.5 inch output from my iMac.
Several reboots did not solve the problem.
I went into recovery console to reinstall OS but was dismayed to find that only
the option to re-install Mavericks was present. .
As I had no choice I selected this option. However three attempts at
re-installing Mavericks failed as I had Yosemite already installed. I somehow
thought that Apple would not possibly have removed the recovery console
ability to re-install, but they had.
What I eventually had to do was erase everything on my hard disc in disc
utility and I was then able to install a clean install of Mavericks.
I then in mavericks tried to install the Yosemite update but my Mac was unable
to download from the store. Luckily I had saved a copy of the original
Yosemite install file and I was able to locate this and run this.
Then after installing Yosemite I had to run all the updates and finally
used the migration assistant to copy all my apps at across from my Time Machine.
All in all it has taken me about 4 hours to complete the process but at least I
can hear Voiceover again through my -headphones and do not have to rely upon
speakers.
Why Apple has not update the Recovery Console so that it supports Yosemite is
very strange. Essentially you can no longer do a re-install with the recovery
console now and you are restricted to clean installs of Mavericks and then
after that upgrading to Yosemite.
I will have to inquire about bootable media to run re-installs from but I
thought that was the whole point of the recovery console.
Checking on Google there are quite a few experiencing the same issue and
complaining.
David Griffith
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