My Kindle doesn't appear as a Device [2020]

same issue here. 

replying to hopefully boost, I am facing the same issue

This wasn't working for me either no matter what I tried. In the end I used my adobe ID to deDRM the file and added it to kindle using calibre. This is the plugin I added to calibre to do this: https://github.com/noDRM/DeDRM_tools/releases/download/v10.0.9/DeDRM_tools_10.0.9.zip

Once added I went into the customize plugin options in calibre and added the adobe key, after which I was able to add the book to calibre. Since calibre was able to detect my kindle it wasn't an issue, but you could also send it manually using amazon.com/sendtokindle

Same issue here.  Mac version, doesn't recognize my Kindle paperwhite.  Not finding answers anywhere.

I ran into this same situation. My goal was simply to get an epub from the library onto my Kindle Paperwhite. What ended up working finally was skipping Adobe Digital Editions entirely and using Amazon's "send to Kindle" service: https://www.amazon.com/sendtokindle No extra software, no cables; just drag and drop and wait for Kindle to sync. It may not work for all situations and people, but I thought I'd share in case it's helpful to someone. 

why is there no response from Adobe here? hello Adobe Service team, can you hear us?

I have the same problem. My wife has a Kobo and ... no problem. Looks like a Kobo for Christmas ... shame Adobe can't be bothered to respond to this thread.

Yup. Veryfrustrating that a common device such as a Jindle is not recognised.

Just chiming in that I also have this issue and would like a response from Adobe. It's been years with more people saying they have the same issue and no resolution or suggestion yet!

Same problem.  Very disappointing this doesn't work with my Houston Public Libary borrowed ebook.