what do you know about Mac?

week2 : What do you know about Mac?

The thing I remember when I hear the word "Mac" is the mark of an apple.
I feel embarrassed, but I don't know any other information's about Mac. I have just some images for Mac computers.
In my favorite detective novels, a very beautiful and rich girl appears. She's heroine, and have special ability in the field of Mathematics. So, she goes to high level university, and her major is engineering. Then, she uses the Mac computers a lot in her university. she seems to use them for drawing some graphs , shapes, and simulation. So, I have the image that Mac is widely used in scientific or mathematical fields. In fact, I've heard that Mac is very good for calculation.
In addition, I heard the Mac is strong for virse. Windows can easily effected by any virus, but Mac seems not to be injured by them so much.
As you know, I have only very little information about Mac, so I want to learn about it more. And, I heard Mac's appearance is very cute, so I want to see it and try it if I could.