Before you buy a new device for your computer, make sure that it is compatible with your system. As a Mac user you will find that anything with an .exe file format won't work on your machine.
On the back of new computer components you will see a list of what operating systems your item will work with. If you see device drivers with a .dmg file format, this will work with your Mac.
Often companies will not accept a return if you open their product and it doesn’t work because of your error. Make sure you have the right product with the right device driver before you get started.