Comment by pwinnski

I have close to 18k ebooks in a library, and every other program I've tried to use in the past falls over dead when facing that.

Calibre doesn't fall over. Instead, it happily and quickly sorts and searches and downloads metadata, and syncs to my Kindle (converting formats if required in the process).

It's the most un-Mac-like program I use on my Mac, certainly, and some days I might even describe it as ugly or unfocused, but there are literally no alternatives that work nearly as well, and there's something to be said for that. And "unfocused" just means it has a lot of features I don't need, but other people may rely on those features and not need the features I use.