Sound not working on my Mac pro

the sound is not working in my Mac pro. The sound icon on the top right hand corner is a pale gray. I went to systeme preferences/sound and I could not see anything particular.
Thanks for your help

Have you tried a PRAM reset?
http://support.apple.com/kb/ht1379
Ciao.

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Sound not working on apple mac pro.

Hi for some reason the speaker on my apple macbook pro has stopped working. I can still use headphones however. When I attempt to mute the volume or change it the icon still appears but with a stop sign below it, a circle with a line through it. Has anyone seen this before.
Thanks

Hey Tillybling!
Here is an article that will help you troubleshoot this issue:
Troubleshooting issues with no audio from built-in speakers on Macs
http://support.apple.com/kb/ts1574
Take care, and thanks for visiting the Apple Support Communities.
Cheers,
Braden

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Why does sound not work on my Mac Air --all setting seem okay. OSX 10.9.2 operating systyem.

Open System Preferences > Sound > Output
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Hello All,
Here's the deal. I just pursuaded my company to buy a brand new Mac Pro to run FCP Studio 2 as a test run to see if they perform well enough to eventually replace our remaining PC's. We've had the Mac Pro for less then two weeks and I'm running into an issue that I can't resolve, and I don't want to fall on my face. The rear Audio input jack keeps failing. Meaning sometimes it works and sometimes it doesn't when speakers are plugged into. The jack on the front works fine, but the rear jack doesn't appear to recognize the speakers after the computer is shut down then restarted. You have to restart the computer 2 or 3 times before the speakers start pumping out sound. Which in all honesty is extermely dissappointing to me. And if I have to bring this thing in to get serviced, my boss will not move forward with buying anymore Mac Pro's, which I'm working hard to make happen.
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Try resetting the SMC: http://support.apple.com/kb/HT1806?viewlocale=en_US.
Also try resetting the PRAM: http://support.apple.com/kb/HT1379.

Help! Logic Express 8 does not work on my Mac Pro with OS 10.5.1

Hello, I hope somebody around here is able to help me.
I have got a new Mac Pro with one Quad core processor since yesterday and it works fine except for Logic Express 8 (version 8.0.1). Whenever I start Logic the program crashes as soon as "Core Audio initialisieren" is shown in the display. I have tried to reinstall the program, deleted it completely and installed it again. It is always the same.
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Confused. 10.6 is DVD based. Only Lion and above are downloads.
And best install is not to upgrade. Do a clean install - on another drive.
Corrupt partition tables or bad sectors or no room to adjust the partitions or the directory is corrupt.
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Hi all,
I have no digital audio output on my 2006 Mac Pro after I updated to 10.6.7. System Preferences recognizes the output but their is nothing coming out. The digital audio port goes from steady red at startup to dark, indicating that it is not receiving anything. I have switched to another digital audio cable with no effect whatsoever.
I reset the SMC with no effect. I have read online that other users are having this issue as well. I appreciate any input or insight into the issue.
Thanks!
Message was edited by: nomadmnemonic

Thanks for the reply a brody.
It has been 3 months and the issue still persists and has not gone away. I agree with pantufl that my Mac has become buggier since 10.6.7. The doc I read and reread didn't do anything except change the frequency rate. There is still no sound.
The update to 10.6.8 didn't resolve anything except prepping it for 10.7
This is extremely frustrating especially since I recently upgraded to a 55" Samsung LED LCD monitor and Onkyo HT S7300 system. I also recently upgraded to EyeTV HD and use my Mac as my HTPC.
I will try the feedback post to see what Apple has planned, if anything.

IChat screen sharing does not work on my Mac Pro

I have a weird iChat screen sharing problem that i can't seem to resolve on my Mac Pro. Ever since i got my Mac Pro in early 2008, using the screen sharing feature in iChat has always been flaky. I have never gotten to the point of getting it consistently working. Lately, i have not been able to get it to work at all.
Most of the time, when i choose to share my chat target's screen (or when i share my screen), i would be able to see my chat target's screen and use the mouse for several seconds before the shared screen session is ended. The errors that i am getting are:
+"Disconnected from Screen Sharing because:+
+No data has been received for the last 10 s..."+
+"There was a communication error during your chat.+
+No data has been received for the last 10 seconds. You can send+
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iChat."
On other occasions (mostly when i am trying to troubleshoot this issue by testing in the same network with my Powerbook, which is on 10.5.6 as well), i get this error:
+"Disconnected from Screen Sharing because:+
+Screen sharing could not be established."+
I have tried to do screen sharing via iChat with other Macs in the same network and also on the internet but with the same problems.
Initially, i thought this may be router related. But the fact that iChat screen sharing on my Powerbook works perfectly both in intranet and internet eliminates my router as the culprit.
I have also tried disabling the OSX Firewall but the outcome was the same.
I read some posts that there may be issue with using the external iSight web cam. I unplugged it, cleaning up all the iChat-related caches and preferences and tried again but with the same result.
I have also tried connecting to iChat using several different account types (mobileme, .mac and AIM) but the end result is the same.
I run a Ubuntu VMWare fusion VM on my Mac Pro as my webserver. I thought that may be the problem. Shutting down the Ubuntu VM also does not help.
Applecare support personnel also instructed me to re-install iChat but that did not help as well.
One interesting error i noticed in the system.log (seen via the Console app) that is generated everytime iChat screen sharing fails on my Mac Pro:
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Message was edited by: Changren Yong
The audio and video chat portions of iChat work fine.

I managed to make some headway in my attempts to troubleshoot this problem. I did a fresh Leopard install on one of the drives in my Mac Pro. I then proceeded to update it to 10.5.6. After that, i launched iChat and attempted screen sharing with my Powerbook. The first few attempts failed, with the following symptoms:
- i would be able to see and control the Powerbook's screen
- after 5 seconds, my screen sharing session is disconnected
I then unplugged my external iSight. After i relaunched iChat, i managed do screen sharing in iChat without being disconnected!!! When i connected the iSight back into the ACD, with iSight off, i attempted to screen share again. This time, it failed after about 5 seconds, just like earlier. I then turned iSight on. This time round, the screen sharing session was not disconnected!!
So in addition to the iSight issue, something in my original Leopard startup disk is causing iChat screen sharing to fail because even when screen sharing was failing on my fresh Leopard install, i do not see this error:
/Applications/iChat.app/Contents/MacOS/iChat(507) error getting server version
So if i can figure out what is causing this error to show up in system.log, then i can manage the iSight issue.

Sound not working on my macbook pro(2013)

Hey,
I've read the other sound issue posts and done everything on them and it doesn't seem to work. My sound stopped working randomly and I hadn't done the latest software update so I did that but it didn't fix anything. Then I tried all the stuff recommended on the other threads here, still not working. I'm wondering if it could be a virus targetting it?
The start up sound works but then when I log in it stops working neither speakers nor headphones work. The weird thing is when I log out and go in as guest, everything works just fine. When I did the turn off and then turn on and press command-option-P-R I noticed the screen went blue and the apple logo turned like a weird negative kind of color. Is that expected? It did it both times I tried going through the motions of the other help posts.
Thanks for any insight/help

Hello chpinto,
Thanks for using Apple Support Communities.
From your post I understand you're getting no audio output from your built-in speakers. What exactly do you mean that you've "done everything?" to troubleshoot? Since you've isolated the issue to being your user account, have you tried booting into safe mode to see if something 3rd party is causing the issue?
OS X: What is Safe Boot, Safe Mode?
http://support.apple.com/kb/HT1564
Troubleshooting issues with no audio from built-in speakers on Macs
http://support.apple.com/kb/TS1574
Take care,
Alex H.

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I have 15.4" Macbook Pro retina display. Realised a weeks ago that my right internal speaker is not working. Any way I can make it work or something I need to check, or should I take to apple care ?
Regards

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Sound not working on my Mac pro

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