Cannot get audio out to work from either Line Out or Headphone Out jacks. Any advice on troubleshooting?
THANKS
Mac Pro, OS X El Capitan (10.11.5), MacBook Pro, Penitum 4 PC
What Mac Pro do you have? The 40 lb silver tower or the little black trashcan?
Just what are you connecting?
When plugged in does it show in System Preferences>Sounds>Output?
Does it show it System Profiler?
OS X: About System Information and System Profiler - Apple Support
Trash can ....
Connecting audio cable to powered speakers -- has worked for years via headphone jack, but now neither Line Out nor HP jack will output sound. Here is System INfo on Audio:
Devices:
AirPlay:Manufacturer: Apple Inc.
Output Channels: 2
Current SampleRate: 44100
Transport: AirPlay
Built-in Output: Manufacturer: Apple Inc.
Output Channels: 2
Current SampleRate: 44100
Transport: Built-in
DisplayPort:
Default Output Device: Yes
Default System Output Device: Yes
Manufacturer: Apple Inc.
Output Channels: 2
Current SampleRate: 48000
Transport: DisplayPort
Display Audio:
Default Input Device: Yes
Input Channels: 1
Manufacturer: Apple Inc.
Output Channels: 2
Current SampleRate: 44100
Transport: USB
Does the speaker now work with another device? Maybe the speakers are broken.
If you plug in a pair of earphones do they work?
If yo know the audio output device is working:
- Try resetting the SMC and NVRAM/PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
https://support.apple.com/en-us/HT201295
About NVRAM and PRAM
https://support.apple.com/en-us/HT204063
- Try starting in Safe Mode
OS X: What is Safe Boot, Safe Mode?
https://support.apple.com/en-us/HT201262
- Boot to Recovery and repair the startup disk
OS X: About OS X Recovery - Apple Support
https://support.apple.com/en-us/HT201314
- If it is repairable reinstall the OSX
How to reinstall OS X on your Mac - Apple Support
https://support.apple.com/en-us/HT204904
- If you do not have a backup use disk utility to restore the internal disk to an external disk so you can try to recover data.
Then format the startup disk and do a fresh install of OSX
about all I can say now is if you hold down the option key (or alt key) and click on the speaker icon at the top of the screen, it shows you a list of all audio inputs and outputs, failing that, I'd go with what IIIaass said
John B
Audio Line Out does not work
