Hi SP
first you'll have to install the Firewire driver on your Mac. This is described in the User Manual, Appendix B.
We do not support ProTools or any other DAW software configuration. You'll need to refer to its documentation/support. I imagine you should be able to use channels inserts or, better, auxiliary SENDS/RETURNS, to send audiuo to the Eventide for processing and then back to your Mac…pretty much like it happend on an analog recording console.
You may want to get familiar with the H8000FW ROUTING concept to make sure the unit is set to receive/send audio via Firewire. There are factory pre_programmed Routings you can access and load by pressing & holding the PROGRAM key for a few seconds.
all the best
I
