Workaround for virtual camera not appearing in MS Teams settings on MacOS

MST_camera_fix.sh

#!/bin/sh
# Microsoft Teams has a code signing issue on MacOS, which means that virtual cameras can no longer be selected.
# Removing the signature is a workaround for that: https://answers.microsoft.com/en-us/msteams/forum/msteams_tfb-msteams_tfmac/microsoft-teams-mac-os-client-is-not-recognizing/d9e863be-d9a4-4d03-a4b8-1b5c7df58828
# This script implements the discussed workaround. 
# I have tested it with MacOS BigSur and MS Teams
# - Version 1.3.00.28778 
# - Version 1.3.00.30874
# - Version 1.3.00.33671
# - Version 1.4.00.4971
# - Version 1.4.00.7175
# 
# Ensure that the script is executable after download: chmod u+x MST_camera_fix.sh
# The script needs administrator privileges, so run it as follows:  sudo ./MST_camera_fix.sh
# Use this script on your own risk.

# MIT License
# Copyright (C) 2020 Marco Immel - marco.immel@gmail.com
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.



# Check if xcode is installed
# Source: https://apple.stackexchange.com/questions/219507/best-way-to-check-in-bash-if-command-line-tools-are-installed
if type xcode-select >&- && xpath=$( xcode-select --print-path ) && test -d "${xpath}" && test -x "${xpath}" ; then
    echo "xcode is installed"
else    
    echo "installing xcode"
    xcode-select --install
fi

MSTEAMS_BASE="/Applications/Microsoft Teams.app"
MSTEAMS_PATHS=(
    "$MSTEAMS_BASE"
    "$MSTEAMS_BASE/Contents/Frameworks/Microsoft Teams Helper.app"
    "$MSTEAMS_BASE/Contents/Frameworks/Microsoft Teams Helper (GPU).app"
    "$MSTEAMS_BASE/Contents/Frameworks/Microsoft Teams Helper (Plugin).app"
    "$MSTEAMS_BASE/Contents/Frameworks/Microsoft Teams Helper (Renderer).app"
)

for d in "${MSTEAMS_PATHS[@]}"; do
    if [ -d "$d" ]; then
        echo "Found: $d"
        codesign --remove-signature "$d"
    else 
        echo "Did not find directory: $d"
    fi
done