You can contact their support and ask if buying the 12 version will let you have access to the 11 version. But let’s be real, the 11 version, like the sim itself, is end-of-life and will never be worked on again.
Maybe we will have to change something, but I have an official LR bug report number for this issue that says “fixed” in Beta 2. So maybe the X-Plane Support person isn’t actually doing any research before pointing the finger back at us. (Wouldn’t be the first time.)
The log either isn’t from one of these attempts or the crash is happening before the CL-650 is even loaded, so I’m not sure what version you’re using.
Since when? Because you installed a beta copy of X-Plane in the last few days, and this version isn’t compatible with the release version of the Challenger.
No.
OFP layout is irrelevant. The only requirement is for “Detailed nav log” to be checked.
You must provide log from X-Plane and fms file from SimBrief for us to investigate further.
Unfortunately the Radeon Pro that Apple put into their products isn’t quite up to the same level as the PC desktop equivalent (despite the VRAM advantage the Apple version has), and the Navi 10 core itself is now over 4 years old. By one benchmark I saw for the Pro 5700 XT you have puts it about level with a GTX 1660 Super, which would be considered somewhat low end by today’s standards.
M3 Max? Personally I wouldn’t go any less if simming is involved.