Hi Neil,

Have you tried rebooting your Mac and rebooting your Router?
If that doesn't help:
Try starting iTunes in Safe Mode.
1. Hold down Command+Option when you open iTunes (this will open in Safe Mode)
Does the freeze still occur?

2. Long into another user account and test. See whether the freeze occurs in 
another User Account.

Cheers,
Ronni
Sent from Ronni's iPad4

> On 14 Oct 2013, at 12:31 pm, Neil Houghton <n...@possumology.com> wrote:
> 
> I've got a problem with iTunes since my last (iTunes) update.
> 
> 27" iMac, 2.8GHz Core I7, OSX 10.6.8 running iTunes 11.1.1
> 
> I seem to remember that on first running iTunes after the 11.1.1 update some
> dialogue box came up - but I had also started iTunes downloading some app
> upgrades including a large one I didn't want to proceed so I tried to stop
> that before dealing with the dialogue box - which I then lost :o(
> 
> I don't really remember exactly how all this went down - but I mention it as
> it may well be the source of my current problem:
> 
> 
> 
> Which is that iTunes is not working - I can start it up and it seems to
> start OK but if I leave it running (without actually doing anything in
> iTunes) it seems to quickly lock up and activity monitor shows it as "Not
> Responding" - Quit process does not work but Force quit does.
> 
> I opened iTunes again and then immediately switched to Activity monitor to
> watch it - and all seemed fine - after about 4 minutes I switched back to
> iTunes (just clicked the iTunes window) and iTunes immediately went to the
> spinning beachball and Not responding.
> 
> I force quit again and restarted iTunes but then very quickly quit it - to
> see if a "normal" quit would smooth things out - but still iTunes starts OK
> but locks up within a minute or so.
> 
> I opened console, cleared the display, and then restarted iTunes and watched
> the messages - when there were no more I went back to iTunes (which
> immediately locked) and force quit. The console messages for this episode
> are below:
> 
> 14/10/13 12:14:32    Firewall[76]    iTunes is listening from 0.0.0.0:58180
> proto=6
> 14/10/13 12:14:32    [0x0-0x78f78f].com.apple.iTunes[11668]    Returning
> 0x0. Advertising wake service for libraryIdentifier "D5B5885051837D5B".
> 14/10/13 12:14:32    Firewall[76]    iTunes is listening from 0.0.0.0:3689
> proto=6
> 14/10/13 12:14:32    Firewall[76]    iTunes is listening from :::3689
> proto=6
> 14/10/13 12:14:32    com.apple.usbmuxd[11654]
> LOCKDOWN_V2_BONJOUR_SERVICE_NAME is _apple-mobdev2._tcp,930d07f5
> 14/10/13 12:14:32    com.apple.usbmuxd[11654]    _SendAttachNotification
> Device 7c:c5:37:d0:13:8b@fe80::7ec5:37ff:fed0:138b._apple-mobdev._tcp.local.
> has already appeared on interface 6. Suppressing duplicate attach
> notification.
> 14/10/13 12:14:33    com.apple.usbmuxd[11654]    _SendAttachNotification
> Device 98:b8:e3:d1:50:64@fe80::9ab8:e3ff:fed1:5064._apple-mobdev._tcp.local.
> has already appeared on interface 6. Suppressing duplicate attach
> notification.
> 14/10/13 12:14:41    kernel    Message Version Check or Length Not Match.
> 14/10/13 12:14:41    kernel    Message Length Check - msglength = 3152,
> expectingLength = 3152
> 14/10/13 12:14:41    kernel    Message Version Check - msg(0.0.0)@0x8ba7024
> atifb:(3.1.0)
> 14/10/13 12:14:41    kernel    Message Version Check or Length Not Match.
> 14/10/13 12:14:41    kernel    Message Length Check - msglength = 3152,
> expectingLength = 3152
> 14/10/13 12:14:41    kernel    Message Version Check - msg(0.0.0)@0x8ac4024
> atifb:(3.1.0)
> 14/10/13 12:15:07    /Applications/iTunes.app/Contents/MacOS/iTunes[11668]
> Entered:_AMMuxedDeviceDisconnected, mux-device:2
> 14/10/13 12:15:07    /Applications/iTunes.app/Contents/MacOS/iTunes[11668]
> Entered:__thr_AMMuxedDeviceDisconnected, mux-device:2
> 14/10/13 12:15:07    /Applications/iTunes.app/Contents/MacOS/iTunes[11668]
> tid:1540f - Mux ID not found in mapping dictionary
> 14/10/13 12:15:07    /Applications/iTunes.app/Contents/MacOS/iTunes[11668]
> tid:1540f - Can't handle disconnect with invalid ecid
> 14/10/13 12:16:27    kernel    CODE SIGNING: cs_invalid_page(0x1000):
> p=11686[GoogleSoftwareUp] clearing CS_VALID
> 14/10/13 12:16:43    mDNSResponder[18]    Client application bug:
> DNSServiceResolve(53F5FEFC2612ED6D._appletv-v2._tcp.local.) active for over
> two minutes. This places considerable burden on the network.
> 14/10/13 12:23:06    com.apple.launchd.peruser.502[143]
> ([0x0-0x78f78f].com.apple.iTunes[11668]) Exited: Terminated
> 
> There seems to be reference to Apple TV here - which is surprising since it
> is months since I actually used my AppleTV (though is is left switched on)
> 
> Ant thoughts at this stage? Prefs to delete?
> 
> My next step will be to switch off the Apple TV and see what effect that
> has.
> 
> 
> Cheers
> 
> 
> 
> Neil
> -- 
> Neil R. Houghton
> Albany, Western Australia
> Tel: +61 8 9841 6063
> Email: n...@possumology.com
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