Thanks, but I've got a second machine on the same router working fine.

I'm pretty sure this is specific to my iMac's configuration. The app begins to launch, and Activity Monitor shows a live process, but I never get an app window, and the application is non-responsive via the dock or Force Quit.

Given the nature of the error type, it appears to be trying to access protected memory, but these error types are pretty vague. I'm out of my league.

Living room: 818v3, Parasound A23+, Maggie 1.6
A/V room: 861v8, DSP7200SE L/R/C, 4x DSP320 surrounds, ID41 + Roon, UHD722, Prime+PS