Anyone else experiencing C4D hangs during "Preparing to render". Unfortunately the hang doesn't generate a bug splat for AC but I have sent the auto generated reports on my iMAC to Apple.
It isn't consistent either, as in I have done a few renders of the same model without any problem but the crash seems to leave the machine doing what sounds like a lot of disk accessing.
AC18 UKI / OSX 10.9.3 Mavericks / 3.4GHz i5 / 8Gb ram NVIDIA GeForce GTX775M 2048Mb
Update: Seem to have narrowed it down to a 3D mesh migrated from AC17 as terrain.
Apple iMac Intel i9 / macOS Sonoma / AC27UKI (most recent builds.. if they work)