Nope. In fact it's physical access to a computer that makes it vulnerable to exploits such as this. With a Mac, if you want more secure your data, encrypt your hard drive. . . and don't let malicious people get access to your computer... regardless of what OS it is running. This is probably Windows FUD...
The thing I don’t get about articles like this is that they don’t make much sense. If you have a machine with sensitive data on it, are you going to allow unknown people unsupervised access to your machine? Chances are you have some form of security already in place to prevent that.