When I am dead, I hope it is said;

AFAIK MacOS and all the apps are still written in C++ or ObjC (or C or Pascal), which don't prevent stupid mistakes like buffer overflows. Until the world moves to verifiable safety and sandboxing (Java/.NET/Eiffel) is there any reason we can expect MacOS to remain secure once it draws substantial attention from malware authors? I don't think I'd run even OpenBSD without a firewall...