Our recent video showing how to get Logic Pro X running in Pro Tools left HD users asking how to get the audio in without using Soundflower, which can’t be used with a HD interface.
Thanks to feedback from community members John M Davis and Noir here is a way to use lightpipe to get the audio out in digital from any Mac app and back into Pro Tools HD. The cable costs around £10.00.
Hope it helps give a further option.