Our OCR engine, OCRopus, is working its way towards a 0.4 release. To that end I've spent a day trying to compile the new code on Mac. As far as I can see I'm the first to attempt it, and it's taught me a lot about Unix programming!
It now builds, and works for some of our test files. First impressions are that accuracy is better where it works, so I'll be working hard to integrate the engine with VelOCRaptor over the next week.