upgraded from Lion > Snow Lion, all other software updates up-to-date Hardware test ('D' + startup)- no problems detected in test modeĦ. NVRAM/ PRAM reset, range of Plists deleted (as recommended in other forums), SMC reset, disk permissions repairedĥ. NB- This is not a simple headphone jack issue- no red light in headphone port, cannot be fixed with q-tips, toggling headphones in port etc.ģ. Troubleshooting as recommended in other similar threads.ġ. Audio Midi Setup- no audio devices found/ IAC Driver 'online', (but won't default to red) youtube will stream clips (without sound) but other online video players pause after about three seconds of play.Ħ. Quicktime v10 will not open video content and displays 'operation cannot be completed'ĥ. no input/ output devices detected in system preferencesģ. I have no sound input/ output on my MacBook Pro 13" 2011, 2.4GHz, OSX 10.8.3Ībout three weeks ago audio simply stopped when I was listening to Spotify through headphones.I haven't been able to recover it since.Ģ.
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