======== /usr/local/bin/camera.sh ==============
#!/bin/sh

if [ -f /tmp/camera ]; then
    sudo chmod a+r /System/Library/Frameworks/CoreMediaIO.framework/Versions/A/Resources/VDC.plugin/Contents/MacOS/VDC
    sudo chmod a+r /System/Library/PrivateFrameworks/CoreMediaIOServicesPrivate.framework/Versions/A/Resources/AVC.plugin/Contents/MacOS/AVC
    sudo chmod a+r /System/Library/QuickTime/QuickTimeUSBVDCDigitizer.component/Contents/MacOS/QuickTimeUSBVDCDigitizer
    sudo chmod a+r /Library/CoreMediaIO/Plug-Ins/DAL/AppleCamera.plugin/Contents/MacOS/AppleCamera
    sudo chmod a+r /Library/CoreMediaIO/Plug-Ins/FCP-DAL/AppleCamera.plugin/Contents/MacOS/AppleCamera
    rm -f /tmp/camera
else
    sudo chmod a-r /System/Library/Frameworks/CoreMediaIO.framework/Versions/A/Resources/VDC.plugin/Contents/MacOS/VDC
    sudo chmod a-r /System/Library/PrivateFrameworks/CoreMediaIOServicesPrivate.framework/Versions/A/Resources/AVC.plugin/Contents/MacOS/AVC
    sudo chmod a-r /System/Library/QuickTime/QuickTimeUSBVDCDigitizer.component/Contents/MacOS/QuickTimeUSBVDCDigitizer
    sudo chmod a-r /Library/CoreMediaIO/Plug-Ins/DAL/AppleCamera.plugin/Contents/MacOS/AppleCamera
    sudo chmod a-r /Library/CoreMediaIO/Plug-Ins/FCP-DAL/AppleCamera.plugin/Contents/MacOS/AppleCamera
    echo "off" > /tmp/camera


======== /usr/local/bin/camera.sh ==============
sudo groupadd cameramaster
usermod -a -G cameramaster USERYA
usermod -a -G cameramaster USERWIFE
chown USERYA:cameramaster /usr/local/bin/camera.sh
chmod g+s /usr/local/bin/camera.sh

======

Создаем скрипт Automator, с одним действием "запустить shell-скрипт", сохраняем как службу, теперь вешаем на него хоткей.

====

Ебать, блядь, мак-ос юзер-френдлее некуда.