No scanner software works on Macs without using dual-boot or an emulator.
This may be your only option then as jonwienke advises. The reason for Computer Aided Scanning software not available for the MAC is TIME. Depending on features, it could take a single programmer 10 to 20 years to do as broken down below. During that time, the Win app will have no or slow releases.
I estimate to do ProScan for the MAC will take at least.
11 years general. All feature functioning.
3 years duplicate the look in feel as much as possible.
4 years learning curve.
? years to get certain dll's made by 3rd party working if at all possible.