Issues connecting PreSonus 16.4.2 to new IMac

[larsongs]

I got my new 27' IMac.

Processor - 3.6 GHZ 8-Core Intel Core I9
Memory - 80 GB RAM
Storage - 2 TB SSD
Graphics - Radeon Pro 580X w/ 8 GB GDDR5
Mouse & Trackpad - Magic Trackpad 2
Pro Apps
Logic Pro X

Pro Tools 2019

Interface - Pre Sonus 16.4.2

I've got the ProTools 2019 installed.

I'm having difficulty with the PreSonus 16.4.2 being recognized by Pro Tools 2019.

I've done the updates per PreSonus. But ProTools 2019 isn't recognizing the PreSonus..

I already bought the Fire Wire to Thunder Bolt Adapter & a Tunder Bolt 3 (USB-C) to Thunder Bolt 2 Adapter as I was told I needed to do... (As there is no Fire Wire to Thunder Bolt 3 (USB-C) Adapter..)

All is connected as prescribed. Still Pro Tools doesn't recognize the PreSonus Interface..

Now I'm being told I need a Thunder Bolt 2 to Fire Wire 800 Adapter..

Any constructive advice as to how I can resolve the Issue at this point is appreciated..

Thanks