Q: hey im josh my mac has no sound at all what do i do ?, hey im josh my mac has no sound at all what do i do ?

did you put your Air to sleep with headphones attached, or closed the monitor with phones attached?

Do not sleep your Air (close the monitor with headphones attached) with headphones attached, this is known to affect some Air under Mavericks.

  * this occurrence is being looked into.

Much testing on my own and others as well show that, in some instances, this occurs in Mavericks.

If you choose you may contact Apple for an appt and diagnostics.

   However as said, refrain from having phones attached when you close the monitor to prevent this until it is resolved

Test this and re-verify

peace  

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.