Mac OS X is the trademarked name for a series of graphical user interface-based operating systems developed by
Apple Inc.
Mac
OS X is a Unix-based operating system based upon the Mach kernel.
Mac
OS X has its roots in Nextstep → so it has the same roots as
BSD.
With Mac
OS 10.6 (August 28, 2009) Apple dropped the Power PC support for the operating system.
Source: http://en.wikipedia.org/wiki/Mac_OS_X
ABBYY offers a big and a small OCR SDK for Mac OS, additionally the Mobile OCR Engine is available for the iPhone OS.