Pro Tools 2019.12 Ultimate Crashes 2019 Mac Pro

[rmccam]

I'm in that unfortunately predicament where I had upgrade my computer, so now I have a new 2019 Mac Pro, running Catalina OS 10.15.3, with Pro Tools 2019.12 installed. I have an HDX card but I haven't installed it yet because I thought to test it native first. It's been a bit of a disaster.

PT launches Ultimate, because that's my license, and it goes through the long process of scanning the plugins. I've been using PT long enough to know to trash prefs and that you may have a sour plugin and to just pull it out of the Plug-Ins folder, but I'm getting crashes from lots of stuff that I know is supported: Waves v11, Izotope (sorta supported), but most confusing is VariFi – which I gather PT won't run without because it keeps reinstalling into the Plug-Ins folder. It's all very odd.

I am well aware that my system isn't supported so I don't expect a solution, per se, but I was just wondering if anyone else has had this issue, because I know some people have got it up and running without any issues.

Thanks in advance.

Ryan