I have been having trouble for the past couple of years using Scan Wizard with my MacBook Pro OS X. It has difficulty locating my scanner, then doesn't recognize it, etc.
I've spent many hours trying to find the "trick" to make it work.

If anyone who knows software could make this reliable, I'd be happy to pay for this rather than disk a very expensive large format scanner.

In the meantime, I've purchased a smaller format Epson, since I cannot afford their large format version.