I have been running my MacMini (late 2014) OSX 10.13.6 without any fuss. I updated the iTunes app as directed and as is my normal practice but then .....
I have now developed a glitch. Suddenly the sound will cut out . and I have to reboot the mac to restore it. It can happen after a few hours or a couple of days of use.
iTunes will not play, Youtube will show video but no sound, Games will play but no longer have sound, homemade videos will play but no sound.
Firstly I checked my Sys Prefs Sound - OK. I then Checked my Xternal Speakers - OK. I tried the Internal speakers - no sound, I then shutdown the mac and pulled out the power cord for a few secs then reinserted and rebooted. I zapped the PRAM. I got terminal to check and reset prefs. I reinstalled a new system using Recovery mode.
Can anyone help please?
Is there any other software at play (Soundflower, AirFoil?) Might be worth taking a look in 'Audio MIDI setup'
Are there potentially any Bluetooth devices paired with the Mini, that might wander in and out of range?
Thank you for your reply. 'Soundflower' is installed it seems, 'Airfoil' is not. I can only think that it must have been installed through another sound editor I use - at least, I guess. Even so, nothing is recently installed. I don't believe Bluetooth would come into play.
Still doesn't explain why this has suddenly happened. Should I go back to an old backup pre the problem occurring?
I found the 'Soundflower' extension in the 'Audio Midi Setup' in 'Utilities'. However, I cannot see how to trash it, nor do I understand what will occur if I do somehow trash it.
All advice greatly appreciated.
It basically intercepts audio, and allows you to send it elsewhere, be that an app, or another audio device virtual or otherwise. It's not usually something you install directly but rather is part of the install process of other apps.
Possible that updating iTunes also changed the default output (not sure why that would happen) You could try making sure SoundFlower is not the default output or input audio device.
Thank you again for the advice. Unfortunately, I tried the uninstall several times and rebooted as per directions, but Soundflower stays doggedly within the Audio Midi Setup. I think a complete reformat of the HD seems the only option. Aaargh.
Oh dear, sorry to report the fault is still with me. Worked well for 3 days and then suddenly no sound. I haven't varied the routine at all, nor fired up any sound editor, just the usual stuff - a couple of games I play, iTunes, some Youtube, photo-editing - etc -nothing new or out of the ordinary. Soundflower has not resurfaced and Audio Midi setup shows only Built-In. Sys Prefs is switched to Headphones and I have not altered anything. I guess a complete format and reinstall is my only option.