Yes, you can. The UFO202 is compatible with all versions of OSX.
Mac OS X Lion is better than Windows 7 because it is faster, doesn't get viruses, is a lot more secure and in my opinion has a better user interface. It's up to you though to decide which is better. Remember if you get a Mac you can run both Windows 7 and Mac OS.
The apple mac name of IEEE 1394 interface is FireWire.
Mac GUI
Mac OS X 10.7 (Lion) was created by a team of programmers at Apple.
Mac OS has a graphical user interface (GUI).
Mac "Lion" and Mac "Snow Leopard" refer to iterations of Apple's Mac OS X (operating system, version 10). "Lion" is the newest as of this writing, and is version 10.7, while "Snow Leopard" is its immediate predecessor, and is version 10.6.
The IEEE 1394 interface is also know as "Firewire" on an Apple Mac.
mac OS 9 is the previous Apple Macintosh Operating System version, before Mac OS 10, or X as it has been advertised as. Mac OS 9 does not utilize the 'aqua' look of the modern mac interface, but instead uses a chunky grey interface. http://www.iindigo3d.com/macosmacos9.jpg for a preview of the interface of mac OS 9
On a Linux machine, the MAC address for an interface can be found in the /sys/class/net/<interface>/address file, where <interface> is the name of the network interface (like eth0 or wlan0). Additionally, the MAC address can also be viewed using the ip link show <interface> command. For IPv6 specifically, while the MAC address itself doesn't change, it can be used to generate the Interface Identifier in the IPv6 address format.
No durple is not the same as MAC. However Durple can be used with a MAC system.
Mac OS X 10.7 (Lion) will be available in the summer 2011 (See links below).
GUI (pronounced "gooey") = Graphical User Interface