To my knowledge, Atlassian doesn't really have a list of recommended WebDAV clients. Honestly, in all my years I've just use Finder on OS X, and it's worked fine.
Here's the WebDAV documentation, just in case you haven't read through it yet:
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Hi Community, Jessica here from the Confluence Product Marketing team! July’s community challenge is all about sharing pictures — and as an extension of our first post on what ...
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