MacBook Pro speakers suddenly low quality?

Hi,
I own a Late-2011 MacBook Pro and I just recently updated the software to Yosemite. Today, I was watching Netflix when suddenly the sound dropped precipitously in quality making the audio sound metallic, muffled, and a bit quiet. I have tried listening to iTunes and other forms of audio, but the sound stays the same. I've done reset the SMC, PRAM, entered "sudo killall coreaudiod" into Terminal, checked Audio MIDI, and restarted my computer at least 5 times by now. Nothing seems to work and I don't believe the speakers are blown because it randomly turns clear before going back to the way it was before and I have never had this issue during the 3 years I've owned this computer. What do I do to fix this issue?

I also have this problem.
Anybody as an answer to this problem????
It is annoying... an instability of all the sound system.
Already tried resetting the SMC, and the PRAM, and nothing works.

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If you have more than one user account, you must be logged in as an administrator to carry out these instructions.
Triple-click anywhere in the line below to select it:
syslog -k Sender kernel -k Message CSeq "Previous Shutdown" | tail | open -f -a TextEdit
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. Post the contents of that window, if any — the text, please, not a screenshot. The title of the window doesn't matter, and you don't need to post that.

Itunes will not play through my MacBook pro speakers, how do i fix this?

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First check System Preferences/Sound - check all the settings to make sure mute is not selected.
Repair permissions & restart.
Troubleshooting issues with no audio from built-in speakers on Macs
Open up GarageBand if installed then, open a program (optional).
Quit out of the GarageBand app.
Resetting your Mac's PRAM and NVRAM

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Go step by step and test.
1. System Preference > Sound > Output > Internal Speakers
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It is quit possible that one of your speakers has become defective. A had a similar issue with my previous MB, brought it to the Apple Store and the genius determined that i need to replace one of my speakers and sub.
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Ciao.
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Hello antol1n1,
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Power
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The computer sleeps or shuts down unexpectedly.
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The MagSafe power adaptor LED doesn't appear to indicate the correct activity.
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Release all the keys and the power button at the same time.
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http://support.apple.com/kb/HT3964
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Best,
Sheila M.

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Ok:
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My MacBook Pro is suddenly slower...is there an easy way to check for viruses?

My MacBook Pro is suddenly slower...is there an easy way to check for viruses?

OpsMgr have methods which can get all host classes. Here my own function which can solve your issue:
function Get-SCOMClassProperty {
param(
[Microsoft.EnterpriseManagement.Configuration.ManagementPackClass]
[Parameter(Mandatory = $true)]
$ManagementClass,
[Switch]
[Parameter(Mandatory = $false)]
$KeyOnly
function Get-SCOMClassKeyProperty {
param(
$ManagementClass
$ManagementClass.PropertyCollection | ? {$_.Key}
If ($ManagementClass.Hosted) {
Get-SCOMClassKeyProperty -ManagementClass $ManagementClass.FindHostClass()
If ($ManagementClass.Base) {
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function Get-SCOMClassAllProperty {
param(
$ManagementClass
$ManagementClass.PropertyCollection
If ($ManagementClass.Base) {
Get-SCOMClassAllProperty -ManagementClass (Get-SCOMClass $ManagementClass.Base.Id)
$ManagementClassProperty = Get-SCOMClassKeyProperty -ManagementClass $ManagementClass
If (!$KeyOnly) {
$ManagementClassProperty += Get-SCOMClassAllProperty -ManagementClass $ManagementClass
$ManagementClassProperty | Select-Object -Unique
If you need to do it in SCOM 2007 R2 then you can try my scripts from this examples http://systemcenter4all.wordpress.com/2013/05/15/scom-monitoringclass-functions/. Last should work in 2007 R2 and in 2012. Example in thread will work only in 2012.
For example just run command:
New-SCOMManagementGroupConnection
$ManagementClassName = "Microsoft.SQLServer.Database"
$ManagementClass = Get-SCOMClass -Name $ManagementClassName
Get-SCOMClassProperty -ManagementClass $ManagementClass -KeyOnly | select Name
Vladimir Zelenov | http://systemcenter4all.wordpress.com

My MacBook pro 17'' suddenly shut down.

my MacBook pro 17'' suddenly shut down with a blink like if you pulled he plug on a old TV. What could course this?

You can try running these tests.
Apple Hardware Test doesn't catch everything, so even if it doesn't find a problem, you could have one.
Apple Hardware Test
Memory Test
Memory Test (2)
This is an older article. This refers to startup, but other discussions have seen it appear as you did.
https://support.apple.com/kb/HT1547
If the computer is still under warranty, you might want to get it checked.

Ok- I might need to be a bit more specific-- My MacBook Pro is suddenly making a whirling noise-- sometimes it's quiet but other times you can really hear it from across the room. This just started happening-- it almost sounds like a tweeting noise --

I submitted a question last night but wasn't specific enough-- My MacBook Pro is suddenly making a whirling noise when it's on. Sometimes it's not too loud-- but other times it almost sounds like a tweeting-- there is nothing in the DVD/CD drive-- Is this something I should have looked at?

This is not normal. It is better to have it checked. Take it to the Apple Store.
Best.

Hi, i have a problem that my macBook pro keys suddenly stopped working. The power button,volume keys, brightness keys and shortcuts do not work. Does anyone know why or how i can fix this problem?

hi, i have a problem that my macBook pro keys suddenly stopped working. The power button,volume keys, brightness keys and shortcuts do not work. Does anyone know why or how i can fix this problem?

hi, i have a problem that my macBook pro keys suddenly stopped working. The power button,volume keys, brightness keys and shortcuts do not work. Does anyone know why or how i can fix this problem?

What i gonna do to my macbook pro its easy low battery.

what i gonna do to my macbook pro its easy low battery.

not sure what you mean by easily low - as Courcoul has stated - replace it if you're having problems with it.
or, keep it plugged in.
what applications are you running that makes your battery drain fast? if you're playing games or watching videos - you're lucky to get 3 hours of battery life.

MacBook Pro speakers suddenly low quality?

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