A pleasure re the Podcasts - we I am no expert but hope that sharing what I have learnt is helpful.
I had completely forgotten about system report so thanks for reminding me. I have just gone to system report and of course everything under Audio now is absolutely fine but your suggestion of sending a screen dump the next time it happens is a good one. Actually taking a snapshot whilst everything is in good health may be a good idea for comparison sake if it happens again. David Griffith > On 14 Dec 2014, at 17:52, Georgina Joyce <g...@gena-j.me.uk> wrote: > > Hello David, > > My sympathies with you that must be annoying. You mentioned System Prefs. I > wondered if you knew about the system report button in "About this Mac”? > Hopefully, it doesn’t happen again but a screen dump of the audio devices > might be useful to some of the Apple forums. (Shift + Command + 3). > > May I take this opportunity to thank you for the instructional walk through > mp3 files you have provided the community. Very good work and much > appreciated. > > Gena > > Georgina Joyce > Applied Psychologist > Training and Coaching. > Because individuals of groups matter! > >> On 14 Dec 2014, at 17:16, David Griffith <daj.griff...@gmail.com> wrote: >> >> 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 >>> >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "MacVisionaries" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to macvisionaries+unsubscr...@googlegroups.com. >> To post to this group, send email to macvisionaries@googlegroups.com. >> Visit this group at http://groups.google.com/group/macvisionaries. >> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to macvisionaries+unsubscr...@googlegroups.com. > To post to this group, send email to macvisionaries@googlegroups.com. > Visit this group at http://groups.google.com/group/macvisionaries. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To post to this group, send email to macvisionaries@googlegroups.com. Visit this group at http://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout.
