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Mike
Mike, Mac Medic
Category: Mac
Satisfied Customers: 8997
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
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My MAC OSX has no sound - no input or output devices found

Customer Question

My MAC OSX has no sound - no input or output devices found....!
Submitted: 5 years ago.
Category: Mac
Expert:  Mike replied 5 years ago.
First I need some information and I also want you to check some things that may or may not be affecting the situation :

Please go to the Apple logo on the upper left of the screen, go to About This Mac (DO NOT Select More Info), and tell me the Version (under Mac OS X), the Processor and the Memory, it is all right there.

Then open Macintosh HD (your hard drive on the desktop usually), then go to Applications folder inside that is another folder called Utilities inside that is an application called Disk Utility. Double click on that and when it opens you will see your hard drive (usually Macintosh HD) on the left. Highlight your hard drive and click on Verify Disk on the far right. If that is OK click on Repair Permissions on the left. If Verify Disk is not OK try to Repair. If Repair is successful then Repair Permissions if it is not successful let me know.
Customer: replied 5 years ago.
10.7.2
2.4GHz
4GB

Verifying disk - says it will take 55mins
Expert:  Mike replied 5 years ago.
ok
Customer: replied 5 years ago.
Verifying permissions for “Macintosh HD”
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/pl.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/pt_PT.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/pt.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/sv.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/ru.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/no.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/fi.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Support/Remote Desktop Message.app/Contents/Resources/da.lproj/UIAgent.nib”; should be -rw-r--r-- ; they are drw-r--r-- .
Permissions differ on “Applications/iTunes.app/Contents/Frameworks/iPodUpdater.framework/iPodUpdater”; should be lrwxr-xr-x ; they are -rwxr-xr-x .

Permissions verification complete

NOW REPAIRING
Expert:  Mike replied 5 years ago.
Ok you were supposed to Verify Disk then Repair Permissions but go ahead.
Customer: replied 5 years ago.
Have repaired permissions
Expert:  Mike replied 5 years ago.
Verify Disk was ok?
Customer: replied 5 years ago.
Yes
Expert:  Mike replied 5 years ago.
What model Mac is it?
Customer: replied 5 years ago.
iMac 20 inch 2007
Customer: replied 5 years ago.
Hardware Overview:

Model Name: iMac
Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB
Bus Speed: 800 MHz
Boot ROM Version: IM71.007A.B03
SMC Version (system): 1.20f4
Serial Number (system): W87310GCX86
Hardware UUID: 00000000-0000-1000-8000-001B63994450
Expert:  Mike replied 5 years ago.
Try this:

Resetting the SMC and PRAM for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve

• Shut down the computer.
• Unplug the computer's power cord.
• Wait fifteen seconds.
• Attach the computer's power cord.
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need them in next step
• Wait five seconds, then press the power button to turn on the computer.
• Press and hold the Command-Option-P-R keys before the gray screen appears.
• Hold the keys down until the computer restarts.
• Release the keys.
Mike and 2 other Mac Specialists are ready to help you
Customer: replied 5 years ago.
Ok will try
Expert:  Mike replied 5 years ago.
Let me know
Customer: replied 5 years ago.
Thank you all fixed
Expert:  Mike replied 5 years ago.
Great!!!
Expert:  Mike replied 5 years ago.
Thanks