Original source is kylemcdonald/ofxTesseract.
install tesseract : brew install tesseract
Open in Xcode
Drag & Drop libs/leptonica/lib and libs/tesseract/lib to Navigator from Finder
Drag & Drop libtesseract.3.dylib and liblept.5.dylib to Project > Build Phases > Link Binary With Libraries from Navigator
In OSX10.11 Xcode7, You must setting Library Search Paths.
Drag & Drop ofxTessarect/libs/tesseract/lib and ofxTessarect/libs/leptonica/lib folder from Finder
Finally, You Need to copy the traineddata what you want to use
[lang].traineddata
to data/tessdata
from ofxTessarect/libs/tesseract/copy_to_data_folder/tessdata
There are only eng, jpn and osd data.
If you want other languages, please download from here.