alt Hacker NewsFTA: “problem 1: webdav or NFS?
The two filesystems I could that were natively supported by Mac OS were WebDav and NFS. I couldn’t tell which would be easier to implement so I just tried both”
I might find out that it is incomplete, buggy or a nuisance to use, but FSKit (https://developer.apple.com/documentation/FSKit) would be my first choice.
macOS actually has an excellent SMB client, so the options actually are: WebDAV, NFS (3.0 and 4.0), SMB, FSKit.