I am getting no sound on my macbook pro. The sound does not play when I plug in headphones either. I have tried making it louder quieter, restarting my computer, HELP!
MacBook Pro
There are many possible causes for this issue. Take each of the following steps that you haven't already tried.
1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.
2. If your model has an audio-out (headphone) port, and anything is plugged in, unplug it before putting the system to sleep.
3. If you've installed something called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and reboot. You should do that even if the software is not causing the problem, because it's useless.
4. If you've installed an equalizer called "Boom" or anything similar, update or delete it and reboot.
5. If an AirPlay device is selected for sound output from iTunes (or from other applications via third-party software such as "Airfoil"), deselect it.
6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select the Output tab. If the Mute boxes are checked, uncheck them. Move the Volume sliders all the way to the right.
7. If a red light is coming from the audio-out port, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. Inserting any kind of tool in the port may cause damage that won't be covered by your warranty.
If there's no red light, the switch may still be stuck in the headphone position. Try to free it the same way.
8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Reboot and test.
9. Boot in safe mode. Don't log in; just reboot as usual when the login screen appears. When you do, make sure the words "Safe Boot" do not appear in the login screen. If they do, the system is still in safe mode and sound won't work.
10. Reset the NVRAM.
11. Reset the SMC.
12. Reinstall OS X after backing up all data. For a possible shortcut, see this thread.
13. Make a "Genius" appointment at an Apple Store.
Just out of interest do you hear a boot chime before or after a PRAM reset?
Is the Sound / Volume icon in the menubar (if present) greyed out?
In System preferences, under 'Sound' -> 'Output' - are you able to see what device is showing?
If greyed out or showing 'Digital' then as the above post has outlined, you have a situation where the audio is stuck so that no sound from the internal speakers will be produced which will require a visit to an Apple Service Provider be it Apple Retail or other.
I am getting no sound on my macbook pro. The sound does not play when I plug in headphones either. I have tried making it louder quieter, restarting my computer, HELP!
