NO Alan, I either use Apple TV or the internal Speakers on iMac
Thanks, I'll watch to see if I can pin down when it occurs,
Cheers
Marcus
Marcus Harris
P.O. Box 7135
Marcus Harris
Shenton Park
Western Australia 6008
Australia
Cryptodome Pty Ltd
cryptodo...@me.com
Mob: +61 (0) 417965618





On 17/09/2013, at 4:01 PM, Alan Smith <sma...@iinet.net.au> wrote:

> Hi Marcus
> 
> A way-out suggestion - - -.    Is your iMac output port ever used for 
> headphones or extension speakers?  Might be a dirty internal switch contact.  
>  Plug in a (clean) headset plug several times and swivel it around to 
> exercise the springs!
> 
> Cheers
> Alan
> 
> 
> On 17/09/2013, at 2:36 PM, Marcus F Harris <cryptodo...@me.com> wrote:
> 
>> Thanks Alan,
>> I'm going to try my setup again to pin down when exactly the SOUND 
>> preferences window refuses to reveal Internal speakers. It occurs afterI 
>> have been playing though Apple Tv but not immediately. I think it could be 
>> after the Apple Tv is left on for a day or two and meanwhile I have had 
>> reason to restart the iMac, but I'll wait until I ned to do that to let you 
>> know.
>> All my software is up to date.
>> cheers
>> 
>> 
>> Marcus
>> Marcus Harris
>> P.O. Box 7135
>> Marcus Harris
>> Shenton Park
>> Western Australia 6008
>> Australia
>> Cryptodome Pty Ltd
>> cryptodo...@me.com
>> Mob: +61 (0) 417965618
>> 
>> 
>> 
>> 
>> 
>> On 17/09/2013, at 10:09 AM, Alan Smith <sma...@iinet.net.au> wrote:
>> 
>>> Hello Marcus
>>> 
>>> I have no problems with the various options of playing music around my home 
>>> network.  I can't replicate your problem.
>>> 
>>> How are you attempting to switch music from AppleTV back to the iMac?  Is 
>>> this a new problem since, say, OSX 10.8.5 update?  Are you referring to 
>>> "Apple Preferences - Sound", the "Apple TV Settings", or the iTunes icon to 
>>> "choose which speakers to use"?   Do you initially choose the music from 
>>> AppleTV/television or from iTunes?
>>> 
>>> If you switch via the iTunes icon, then are your various devices visible 
>>> initially?    I have choice of Computer, AppleTV or Airport Express.  Do 
>>> you have Single or Multiple option selected?  What displays when the 
>>> problem happens?
>>> 
>>> I find the Apple Preferences - Sound to be unstable on rare occasions.   
>>> When this happens the ticked item does not work.  I generally get it 
>>> working again by ticking another item and back to the output (or input) I 
>>> want.  But all choices are still displayed.
>>> 
>>> Cheers
>>> Alan.
>>> 
>>> 
>>> On 16/09/2013, at 5:08 PM, Marcus F Harris <cryptodo...@me.com> wrote:
>>> 
>>>> Hi, I tried to switch playing music in iTunes from Apple TV back to my 
>>>> iMac desktop.
>>>> The sound preferences window, didn't show the iMac as a choice .
>>>> I turned off the Apple TV and that didn't change anything.
>>>> I then restarted the iMac and low and behold sound was available as a 
>>>> choice on the iMac.
>>>> Is there some way to avoid this process of switching from Apple TV back to 
>>>> iMac? Hopefully I didn't miss something obvious!
>>>> iTunes 11.0.5
>>>> iMac 27 late 2009 3.06GHz System OSX 10.8.5
>>>> Thanks
>>>> Marcus
>>>> Marcus Harris
>>>> P.O. Box 7135
>>>> Marcus Harris
>>>> Shenton Park
>>>> Western Australia 6008
>>>> Australia
>>>> Cryptodome Pty Ltd
>>>> cryptodo...@me.com
>>>> Mob: +61 (0) 417965618
>>>> 
>>>> iMac 27 late 2009 3.06GHz System OSX 10.8.5
>>>> 
>>>> 
>>>> 
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