LanguageHCO
Macintosh sound resource fork
File type: Audio and sound file
A hco file extension is related to the Macintosh sound resource fork format.
What is hco file?
File type category:
Audio and sound file
Date updated: August 31, 2018
The hco file extension is associated with the old versions of the Mac OS. The hco file contains sound.
Most likely some old format without support. No further information could be found.