Spyware? I'm on a Mac.
Uh, huh. Have you checked?
For theoretical threats that don't even exist yet despite Symantec's dire predictions that they had to swallow with a hearty dose of crow a few months ago?
Installing stuff in OSX as I have it, unlike Windows, requires my administrator-level approval with a password. For ANY installation or new runtime. And I can see all active processes in a Unix list in a Terminal window. Anything I don't recognize was running, I'd see it. And I don't install anything that's not a major application package from a trusted company.
In fact, the only thing that would introduce a security hole in OSX is Norton Antivirus.
On Tuesday, Symantec admitted that all versions of Norton Anti-Virus (NAV) contain a security vulnerability that could allow a malicious user to remotely take control of the computer. This kind of announcement is common to Windows users but this flaw also affects NAV running on Apple's OS X platform.