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Mac no sound [SOLVED] - Driver Easy
https://www.drivereasy.com/knowledge/mac-no-sound-try-these-methods/#:~:text=Move%20the%20Output%20volume%20slider%20all%20the%20way,Keep%20plugging%20and%20unplugging%20until%20Internal%20Speakers%20appears.
MacBook Air no audio output device found - Apple
https://discussions.apple.com/thread/1736638
Pressing the volume buttons on the keyboard flashes up the level indicator on the screen but it does not change, and also a little "O" with a line through it appears underneath. The Sound Preference panel says "No Input Devices Found" and "No Output Devices Found", and the volume slider is grayed out, set a max, with a grayed Mute box ticked.
Mac no sound [SOLVED] - Driver Easy
https://www.drivereasy.com/knowledge/mac-no-sound-try-these-methods/
Top 8 fixes to get sound back on your Macbook Air/Pro Method 1: check the audio settings Method 2: disconnect external speakers Method 3: check the audio settings Method 4: turn off Bluetooth Method 5: restart your Mac Method 6: Reset NVRAM Method 7: create a testing account on safe mode Method 8: update your MacOS
MacBook Air no audio output device found - Apple
https://discussions.apple.com/thread/1736638?page=23
Here are all of the known steps to recover your audio. (copied from HighTechDad.com) How to fix the “No Output Devices found” issue on your Mac: Reboot – rebooting your computer is a tried and true method for “fixing” all sorts of problems (and it is not limited to just Macs, it works for PCs too!).
Macbook Air without Sound, and missing Input/Ouput device ...
https://apple.stackexchange.com/questions/364682/macbook-air-without-sound-and-missing-input-ouput-device-options
Fully shut down your Mac Restart your Mac Immediately press the Shift key and keep it down Let go of the Shift key when you see the login window (NOTE: If you have FileVault enabled you may need to log in twice). Take a note of what happens (i.e. does sound work, do you have sound devices listed in your Sound preference pane, etc)
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