Hello, I was installed "Alpha 6 RC2" a few minutes ago but same problem on macOS Sierra & C4D R17;
The plugin libCoronaCore.dylib has crashed.
More information can be found in
'/Users/HULU/Library/Preferences/MAXON/CINEMA 4D R17_89538A46/_bugreports/_BugReport.txt'.
After clicking 'OK' unsaved scene files will be saved as '_bugreports/_recovery_xxx.c4d'