1. From the Apple menu , choose System Preferences.
2. Click Sound.
3. Click the Output tab, then select the built-in speakers. ...
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...
It might raise some questions to you seeing the title of the post. The scenery and the other natural things should not change on Everest base camp trek but it makes huge differences if you do late to do the Everest base camp trek. You should do it now if you would like to do it easier and cheaper. So, if you don’t trek to the Everest base camp now, you will hate yourself later for sure.
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