The simple answer to your question is happy to help.
Yes I'm running boot camp. However you can also install Parallels or VMWARE Fusion. All three options work. Then you purchase the KEYSPAN USB to serial adapter. That's the only hardware you need. It converts the USB port into a serial. Then you plug on the serial cable and you're set. You will need to purchase Windows XP or 7 and install it on Bootcamp or Parallels. Then once you are booted into Windows, you install the Anthem software and you are set. You can run ARC, perform updates, etc. it's a piece of cake. Is there an Apple Store near you? If you don't feel comfortable with any of that you can make an appt with a Genius and have them help you set it all up or help walk you through it. In happy to help field questions as I'm sure others in this forum are too. To Kal's point, if you don't want to buy a copy of Windows then get the cheapest PC Laptop you can find, buy the Keyspan USB to Serial Adapter and use it on the windows laptop. Windows laptops seldom come with serial ports any longer.