New iMac. -- I can't get sound.

[3Hotdogs]

It was working up until two hours ago.

Mute is not enabled. Sound level on bottom of videos is at high.

[cayugafalls]

1. Browser tabs or all devices?

Can you play an mp4?

If browser tab, check to see if site is muted. Click the sound icon on the tab, or right click and select unmute from the pop up menu.

[LuvLoogie]

2. In the sound preferences, what is selected as output?

Have you paired it with bluetooth headphones recently?

[3Hotdogs]

4. Paired with number keyboard and track pad

[LuvLoogie]

3. Also, is it application specific?

Can you play and hear a system alert sound?

[3Hotdogs]

7. Im not getting any sound from any source

[Louis1895]

5. If the internal speakers on your Mac aren't working (Apple Support)

https://support.apple.com/en-us/HT203186

Check your sound settings

If you still can't hear sound from the internal speakers after updating your computer's software, check your sound settings.
First, disconnect any external audio devices from your computer. Also disconnect any cables from the USB, Thunderbolt, or 3.5mm audio ports.
1. From the Apple menu , choose System Preferences.
2. Click Sound.
3. Click the Output tab, then select the built-in speakers. If you don’t see built-in speakers as an option in the Output window, contact Apple Support.
4. If the Output volume slider is set low, move the slider to the right and test again.
5. If the Mute checkbox is selected, deselect it and test again.
6. If you still don’t hear any sound, contact Apple Support.
Published Date: June 19, 2020

[LiberalArkie]

6. Goto System Preferences and select sound

Check what is selected in the output tab.

If correct: select sound effects and make sure that is correct. When correct click on one of the sounds and see if anything sounds.

There are also an alert volume and an Output Volume control there.

[bullimiami]

8. Try restarting core audio service

Open terminal

Type

sudo killall coreaudiod


If it’s not the problem it won’t hurt anything

You may want to save that command

I have to do it periodically on my laptop

[cayugafalls]

9. If not fixed yet, here is a list of things to try.

https://www.macworld.co.uk/how-to/mac/mac-sound-not-working-3504175/

[msongs]

10. maybe sound is extra? nt

[3Hotdogs]

11. I got it. It was the F9 button

Thanks guys.