On your macbook pro or air macOS Monterey if you have connected your external drive or external speakers or external monitor and you get to see no input or output devices found on macOS Monterey then you can fix this error on your own by just following these quick and easy solution and get rid of no output devices found mac Monterey or bug sur or any macOS.
If you get this error no input or output device found or external monitor or speaker then you need to first check if the cables are not faulty and restart your macOS also you need to check with permissions with system preferences and check.
Fix No Input orOutput Devices Found on Macbook Air or Pro Monterey
Below troubleshooting methods will help you fix this no input or output device found when connected to macbook macOS monterey when connecting external speakers or external monitor or any other issues when connecting to macbook pro or air having macOS Monterey.
If you are connecting speakers or external monitor using cables and you get to see no input or output device found then you need to replace the cable and check for faulty cables and check the issue of no input or output device found error.
Step 1: Open mac Terminal using finder or spotlight search and open it.
Step 2: In Mac Terminal enter this command -> sudo killall coreaudio and hit enter.
Step 3: Now, restart your mac using apple menu -> restart and confirm restart.
That’s it, once you execute these commands you need to restart your mac and once your mac restarts then go ahead and check, your issue of no input or output device found error on your mac with macOS Monterey will be resolved successfully.
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Reset NVRAM / PRAM
Step 1: You need to shut down your mac -> Apple menu -> Shutdown -> confirm shutdown.
Step 2: Now, wait for few seconds and press power button.
Step 3: Now, immediately -> press command + P + R Keys at the same time until you hear startup sound for second time.
Step 4: Hold down the keys until you see apple log for second time.
Step 5: Wait for your mac to restart and it can take up to 15 to 20 minutes.
If you are using intel based Mac with T2 Chip
Step 1: Shut down your mac using apple menu
Step 2: Now, immediately press and hold shift + control + option + Power button simultaneously for 10 to 15 seconds and release the keys.
Step 3: Now, turn on your Macbook using power button.
If you are Mac with Apple Silicon
Step 1: Connect your Mac to power source.
Step 2: Restart your Mac with via apple menu -> Restart while charging.
Create User Account
Try to create user account and provide administrator privileges and check input or output devices found error on your macbook will be resolved.
Execute Commands Using Terminal
Step 1: Open terminal on your Macbook
Step 2: Execute -> sudo kextunload /System/Library/Extensions/AppleHDA.kext and enter your macbook password hit enter.
Step 3: Now, executer -> sudo kextload/System/Library/Extension/AppleHDA.kext
Step 4: Now, go ahead and restart your Mac and your issue of no input device found or output device found will be resolved successfully.
Use Safe Mode
You need to restart your macbook pro or air in safe mode and once you restart your mac in safe mode you issue of no input or output found on macOS monterey will be resolved and to exit safe mode simply you need to restart your mac and exit safe mode.