Mac OS X
Q: Audio system on early MacPro is not working.
A "slash/circle" symbol appears on the screen when I press the volume up or down key. I just reinstalled Yosemite after a crash on my MacPro (2008). All else is working fine.
Posted on Sep 15, 2016 6:31 AM
by jeremy_v,Solvedanswer
Community Specialists
Hello BoxerDesign,
Thank you for using Apple Support Communities.
I understand from your post that when you press the volume keys up or down that you see a slash/circle symbol appear on your Mac Pro screen. I know how important it is for you to be able to adjust the volume. I recommend following the steps from the article I have linked for you below to resolve this issue:
Troubleshooting issues with no audio from built-in speakers on Macs
Best Regards
Posted on Sep 15, 2016 7:01 PM