There[SQ]s no known application or software officially called "Mounty" specifically for Mac. It[SQ]s possible :

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You[SQ]ve misspelled the name:

Try searching for similar-sounding names of Mac apps related to file management, network drives, or cloud storage.
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It[SQ]s a very niche or newly released application:

Less popular software might not have widespread online recognition.
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It[SQ]s an internal or company-specific application:

Some organizations use custom software with internal names.
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It[SQ]s a typo:

Double-check your spelling.

If you can provide more context (where you heard about it, what it[SQ]s supposed to do), I might be able to offer a more specific answer.