The bundle identifier of the filter data provider system extension.
- macOS 10.15+
If this property is
nil, then the framework uses the bundle identifier of the
NEFilter extension in the calling app’s bundle. In this case, make sure the calling app’s bundle contains only one
NEFilter, so there’s no ambiguity about which one to use.
This property only applies to system extensions, since macOS doesn’t support implementing a filter data provider as an app extension.