Airplay - MacPro Stopped Working

I have an Early 2008 Mac Pro and a new Apple TV. Audio output, via Airpay, worked just fine from my Mac to the AppleTV until I just tried it again today!
I tried restarting the Mac and the AppleTV. The option appears in the Audio Output on the Mac, but when selecting it, it doesn't send audio there and defaults back to the internal speaker after a min or two.
I'm at a complete loss. Airplay is working just fine on my iPod to AppleTV, so I'm guessing its a problem with the Mac, possibly since updating to Mountain Lion 10.8.2. Seems lately most of the Apple Updates break something somewhere.
Is there any way to "reset" the audio system on the MAc? Any preferences to possibly delete?
Thanks.

Ok, i fixed it.
Just for documentation:
I started the MacBokk with Command-R
I choosed to reinstall Mountain Lion
After the system was installed again, AirPlay Mirroring was working perfectly again.
I had to update the system again, but everything is fine again.
All installed software is still working, so it was quite easy, no need to istall everything again.
Checking the console output, now the AirPlay agent seems to work, so this was definately the problem:
01.12.12 14:40:35,618 AirPlayUIAgent[465]: Bug: 12C60: liblaunch.dylib + 23849 [2F71CAF8-6524-329E-AC56-C506658B4C0C]: 0x25
01.12.12 14:40:35,620 AirPlayUIAgent[465]: 2012-12-01 02:40:35.619978 PM [AirPlayUIAgent] AirPlay starting display mode for 1080p
You can see it seems to start correctly in 1080p
Regards,
JvdL

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Apple TV Airplay Just Stopped Working

Apple TV Airplay Just Stopped Working. I have a second Apple TV that still works with the same connecting devices and no problems. Running 10.8 on my macbook Retina, iphone 5 is up to date and ipad has latest. One day I went to connect and it wouldn't show on my macbook as an available airplay.
So frustrating, I have reset, re-connected via wifi, turned airplay on and off, checked setting on my machine, made sure I am on the same wifi network... still nothing.

BTW, I should clarify, I am specifically having a problem mirroring. Home sharing is on and all my library is there, just no mirroring.

Airplay mirroring stopped working

Hi,
i have a problem which i can't solve.
My MacBook Pro Retina 15'' was able to use the airplay video mirroring on the AppleTV 3 without problems.
Some days ago, i saw, that the icon was not longer available in the menu bar.
The system settings just shows "No device found".
I can use the AppleTV for audio streaming without problems.
I tried another AppleTV (also with latest software) and it doesn't work, too.
So it seems to be a problem wirth my MacBook.
Is there any settings file, system component or other file, i should check (or maybe delete)?
I took a look into the system console and found the following entries regarding "airplay"
You can see, that i started audio airplay from iTunes, but there are two lines that may show some problem.
Does anybody have a hint?
30.11.12 21:12:13,490 iTunes[4619]: 2012-11-30 09:12:13.490436 PM [AVSystemController] Stopping AirPlay
30.11.12 21:12:13,650 AirPlayUIAgent[4741]: Bug: 12C3006: liblaunch.dylib + 23849 [2F71CAF8-6524-329E-AC56-C506658B4C0C]: 0x25
30.11.12 21:17:48,194 iTunes[4619]: 2012-11-30 09:17:48.193916 PM [AVSystemController] Stopping AirPlay
30.11.12 21:20:14,760 iTunes[4619]: 2012-11-30 09:20:14.759691 PM [AVSystemController] Stopping AirPlay
30.11.12 21:21:52,212 iTunes[4619]: 2012-11-30 09:21:52.211863 PM [AVSystemController] Stopping AirPlay
30.11.12 22:41:08,038 iTunes[4619]: 2012-11-30 10:41:08.037837 PM [AVSystemController] Stopping AirPlay
30.11.12 22:41:10,238 com.apple.launchd.peruser.501[132]: (com.apple.AirPlayUIAgent[4741]) Exited: Killed: 9
30.11.12 22:42:04,669 iTunes[5071]: 2012-11-30 10:42:04.669112 PM [AVSystemController] Stopping AirPlay
30.11.12 22:52:01,906 iTunes[154]: 2012-11-30 10:52:01.905814 PM [AVSystemController] Stopping AirPlay
01.12.12 08:25:20,449 iTunes[285]: 2012-12-01 08:25:20.448744 AM [AVSystemController] Stopping AirPlay
01.12.12 08:45:11,919 iTunes[151]: 2012-12-01 08:45:11.919218 AM [AVSystemController] Stopping AirPlay

Ok, i fixed it.
Just for documentation:
I started the MacBokk with Command-R
I choosed to reinstall Mountain Lion
After the system was installed again, AirPlay Mirroring was working perfectly again.
I had to update the system again, but everything is fine again.
All installed software is still working, so it was quite easy, no need to istall everything again.
Checking the console output, now the AirPlay agent seems to work, so this was definately the problem:
01.12.12 14:40:35,618 AirPlayUIAgent[465]: Bug: 12C60: liblaunch.dylib + 23849 [2F71CAF8-6524-329E-AC56-C506658B4C0C]: 0x25
01.12.12 14:40:35,620 AirPlayUIAgent[465]: 2012-12-01 02:40:35.619978 PM [AirPlayUIAgent] AirPlay starting display mode for 1080p
You can see it seems to start correctly in 1080p
Regards,
JvdL

Airplay is stop working but network connection ok: airport express

Hi,
I hope someone could help me, I can't find the solution.
I have an airport express which I use for internet access and airplay.
Sometimes when I awake (from sleep mode) my MBP (running OSX 10.6.8) airplay doesn't work anymore. It means Itunes says that remote speaker airport express cannot be found and airport utility can't find the airport express either. But internet connection still works perfectly!
So I have to reboot the MBP to get back my airplay service, the problem seems to be on the mac.
I have updated airport utility and airport express to the latest firmware, so I don't have any other idea.
Would you have ideas?
Thanks!

Found the fix under a different search. Turns out the Linksys router was blocking the iTunes. Have no idea why it would show up momentarily and then disappear though. In any event, the fix is:
I have a wired Ethernet network and run through a Linksys cable/DSL 4-port router. Model #BEFSR41. Here's how we fixed the problem step-by-step:
1) Open a browser window and access the router control panel by typing in 192.168.1.1
2) Click on the "Security" button at the top of the screen
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4) At the bottom of that page, there is a set of four or five radio buttons. One of them says "Filter Multicast". Mine was disabled. CLICK THIS TO ENABLED.
This fix comes directly from this post about getting Apple TV to work:
http://discussions.apple.com/thread.jspa?threadID=2234430&tstart=0
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Hi Adam
If someone has spilled some liquid there must be hardware malfunction and I assume that keyboard is defect now. Try to contact service partner and pick up some information how much the new keyboard costs. You can also a Google a little bit around and find which keyboard fit to your notebook model.
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Hello Burl3y,
Thanks for using Apple Support Communities.
It sounds like you're having issues with both Home Sharing and AirPlay between your MacBook Pro and AppleTV. For troubleshooting the issue with Home Sharing, take a look at the following article:
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http://support.apple.com/kb/TS5209
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Intermittent problems are often a result of interference. Interference can be caused by other networks in the neighbourhood or from household electrical items.
You can download and install iStumbler (NetStumbler for windows users) to help you see which channels are used by neighbouring networks so that you can avoid them, but iStumbler will not see household items.
Refer to your router manual for instructions on changing your wifi channel or adjusting your multicast rate.
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Hello poitin,
Thanks for using Apple Support Communities.
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Airplay - MacPro Stopped Working

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