You might be asking whether all these great things will slow down your Mac and prevent you from doing all the fun things you normally do. The answer is NO.
Read what researchers are saying about Mac protection
"The idea of the consumer being protected due to lack of market share is fairly obtuse, as more people buy into the product and market share grows, targeted attacks will grow as well. You also have to consider that Microsoft has a patch program in place that provides patches and updates on a more regular basis than Apple, this is something that the consumer should care about, as should they care about the plethora of PC security products that exist.
"I have a Mac. Having a Mac is more secure because not that many people have Macs. I think their market share is still less than 15 percent. For every point of market share, the risk goes up. Mostly I have a Mac because it is a better machine, not because it is more secure.
"I realize the market share argument is a cliche, but I feel it is true--OS X wins from a security perspective because it has a lower market share. Windows Vista and Windows 7 have some impressive security controls that are not present in OS X. If we were to flip the market share, we would see a lot more exploitation in the wild. More specifically, browser security is one of the more important items to consider today from a risk perspective.