I've been using RC2 for a few days now and have had many crashes. Nothing specific, but just working on a scene and doing different things. Sometimes dragging a material into the manager. Sometimes the IR is on. Sometimes the IV is running. Sometimes no rendering is happening. I will upload the crash report and scene file.
I will say, I may have found a bug, but I will investigate more and post separately for that.
Full-speed non-debug version
Build timestamp: Jul 2 2021 15:04:17
Version: 7.0 rc 2
Cinema version: R20.059 CINEMA 4D Studio
MacOS Catalina 10.15.7