Make your Mac app's extensions immediately available on macOS with a run script build phase

reloadplugins.sh

# Add this to a "Run Script" build phase in your app's main target, as the last step.
# It will use the pluginkit command-line tool to force the plugin system on macOS to add your extensions to its database, making them available.
# I made this specifically for widgets, but it should work for pretty much any extension type (appex bundle).

find $CODESIGNING_FOLDER_PATH -name '*.appex' -exec pluginkit -a {} \;