Thanks - Not sure about the SIGKILL that is all I've been able to see, even with "-v" it stops verbose output and switches to the progress indicator with mouse pointer before crashing back to that screen so I'm kind of blind...
Yeah, I'm not sure if the installer crashing at 12 minutes is a symptom or the cause. I wonder if something makes it crash before its finished some part of the install and the reason its then in a reboot loop is because it never finished doing the install part. (Or if indeed it is a crash at all and not just a normal part of the process?)
I still think we could be onto something regarding RTC0 - I'll come back to that later. Currently compiling snippets of code from DSDT/SSDT and some Ioregexplorer screens for you to take a look at, But thought id share another update because it might help direct us to the problem...
This morning I rebuilt the USB installer using the latest 20B50 build (before was 20B29 I think) but same behaviour. This time while the installer was running I opened the installer log and switched to "show all" and I managed to get a couple of photos of the logs right before it crashes out at 12 minutes remaining, they are scrolling real fast though so some is very blurry - I can't really tell if any of these are critical errors or normal process?
Also of note, one the reboot Opencore does not find a Preboot volume which I think I'm expecting to see if the install is progressing normally?
I've numbered them in order here, 1,2,3,4,5,6,7,8, black screen, reboot, then the reboot loop as mentioned before: