.MDIMPORTER File Extension
File TypeMetadata Importer
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an MDIMPORTER file?
Data plugin file created for the Spotlight search tool; returns metadata contained with a file to the Spotlight tool so file data can be searched and retrieved; not meant to be opened manually.
When a file is changed, Spotlight loads the specific MDIMPORTER file and extracts the metadata.
To see what MDIMPORTER files you have installed go to the Spotlight folder located in the /System/Library/ directory on your Macintosh HD.
NOTE: If a file does not have a MDIMPORTER, it will only be able to be searched for by the file name.