There are no drivers for your Webscan that support OS X. Windows only. Unless you can find a compatible driver that supports OS X, you can not use it with your Mini. There are many Web cameras that do support OS X. Check out the Logitech web site.
I'm guessing it's the scanner you want/need... I could only find them for very old macs.. You could take a look at vuescan. As was suggested the cam you could try macam..
Shop for your Apple, Mac, iPhone and other computer products on Amazon.
We are a participant in the Amazon Services LLC Associates Program, an affiliate program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.