DR DIGBY L. JAMES  This product should now be avoided like the plague.

Omnipage used to be state of the art. But the Mac version, having changed hands several times, has been left in limbo, and has not been updated for nearly 10 years. It runs under OSX X Leopard, even on an Intel Mac. But you can't use the scanning function which requires Classic (not available on an Intel Mac). And if you have a new scanner it's probably not in the scanner list.

Also, if you are upgrading there's another gotcha. It may not open your old files. To get round this, make sure your files have .opd as the file extension. Then open then in a hex editor and examine the resource fork. In all probability there isn't one. And that's why Omnipage won't open them. Create a new Omnipage file (import a single image - even a photograph) and save it. Open in the hex editor. Switch to the resource fork. Copy resource fork and then switch to the problem file. Paste into the resource fork and save. The file should now open (from the menu, not by double-clicking). You can then export the scanned images and use a more modern OCR package. I use, very successfully, ReadIris. Buy that instead.

If you MUST buy Omnipage have a hunt. I found a site (which I now can't find, of course) of a company that had taken it over and was selling at under £100 (~$150).  
(Version 11.0)