Thanks, that's what I was looking for. I guess I haven't really been following Gruber long enough to have been exposed to those arguments, and he doesn't really

Thanks, that's what I was looking for. I guess I haven't really been following Gruber long enough to have been exposed to those arguments, and he doesn't really seem to have linked back to them (they are pretty old). That said, I'm not sure I follow his arguments. The first one seems to be that the Mac community is less tolerant of malware/crapware. But as the market expands, especially to former Windows users, doesn't this become less true by definition? It's an explanation for why there hasn't been much malware on Macs, but not really one for why there couldn't or won't be. The second was isn't an argument so much as an assertion. Though this might be a case again of me not being familiar enough with his writing historically and his audience. Maybe he's speaking from the assumption that his audience understands technical details about Mac OS architecture/design that makes this true? You're right, though, it does indeed seem like Mac App Store exclusivity is where Apple is headed. And that does seem likely to make the OS fundamentally more secure than others, mostly reducing potential exploits to third party app/web.