I have an old Neat Receipts scanner Scanalizer. I also have a Mac. Unfortunately, it seems that Neat Receipts may abandoning the Mac market with the release of their Neat 5 software, as it still only works on Windows (so far), and the Mac Neat 4 software still doesn't work correctly on Mountain Lion. (This may be a driver issue.)
In the meantime, I've found that the old Scanalizer (model number SCSA4601EU) is actually a re-branded PlusTek OpticSlim M12, which does have drivers that work fine on Mountain Lion.
I had tried installing that driver on top of the Neat software, and it still didn't work, but I uninstalled everything, installed tthe PlusTek driver first, then re-installed the Neat 4 software on top of that, and it seems to be working again. Whew!
So, I think I'm using it that way, for now. However, I'm transitioning to MoneyWell for my personal finances, so that means that I can now also just scan 'em with the PlusTek software, and then use MoneyWell to keep my receipt images. Only trouble is, Moneywell doesn't offer one-step scanning, or OCR of the receipts, so... I might be stuck with both.