Paperless lets you scan or import receipts and other paperwork, using Optical Character Recognition (OCR) and other data entry tools to help recognize and categorize receipts and documents as PDF files. The software also features built-in search capabilities for finding and organizing receipts and documents into collections, as well as tools for tracking expenses for taxes, creating searchable PDF files for owner’s manuals or other documents, and more.
1) Versions 2.0.4 - 2.1.6 are 32 bit Intel binaries and require Mac OS X 10.6 at least.
2) Versions 2.2.0 - 2.3.3 are 32/64 bit Intel binaries and require Mac OS X 10.6 at least. However, although versions 2.3.2 and 2.3.3 load in Mac OS X 10.6.8, archived developer web pages suggest that they might require Mac OS X 10.7.
3) Versions 2.3.7 - 2.5.0 are 64 bit Intel binaries. Versions 2.3.7 - 2.3.8 require Mac OS X 10.7 at least, and versions 2.3.9 - 2.5.0 require Mac OS X 10.11 at least.