It’s gorgeous. Inside and out.
Since the software on every Mac is created by the same company that makes the Mac itself, you get a completely integrated computer that’s as secure, stable, and powerful as it is elegant and easy to use.
Apple: Why Mac
It's so damn secure - that it ships with a root exploit. (Excuse me, maybe it's just that user friendly, that it won't ask for the root password).
Anyway, here's how to fix it (one line!):
chmod u-s /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent
Sources:
Mac OS X Root Escalation Through AppleScript
ARDAgent root privilege escalation
Root-Exploit für Mac OS X
Remember:
Security is like sex. Once you're penetrated you're ****ed.