How to install .dict.dz/.index files to OSX dictionary.app I have a dictionary that consists of a dictionary.dict.dz and dictionary.index files. How can I install this dictionary for use with OSX dictionary app (running Mavericks)?

It works fine with GoldenDict, but I'd prefer to have this dictionary amongst the rest.

DictUnifier, which I have used to install a few other dictionaries, doesn't recognize the file.
It looks like your input files are in the DICTD format. This can be converted to AppleDict XML source and then compiled for use with the OSX built-in dictionary using pyglossary as described at https://apple.stackexchange.com/a/119166/66812.