(I suspect Windows developers will be less inclined since Kindle for PC is still an option for Windows users. In the long-run, however, getting an e-ink Kindle and using the Download & Transfer via USB option is a better bet - unless a Mac developer is motivated to figure out the new key. If you’re one of the people that doesn’t like the latest Kindle updates and just wish you could get your Kindle back to how it used to be, there is now an easy way to downgrade your Kindle’s software to an earlier version using this Downgrader 2.0 tool. Note: De-DRM'ing ebooks from 1.25 & 1.26 is only possible on Kindle for Mac.
I plan to experiment with Catalina if I can do so without compromising my Mac. However, it works on High Sierra and Mojave. I say 'should' because no one has tested it on Catalina yet (that I'm aware of). It's a little tricky, but in some - but not all - cases it should also be possible to get the key to successfully remove DRM. Compare features and view game screenshots and video to see why Minecraft is one of the most popular. Kindle for Mac 1.25 & 1.26 are 64-bit and should run on Catalina. Minecraft for Kindle Fire supports cross-platform multiplayer with these platforms: Windows, Xbox Series XS and Xbox One, Nintendo Switch, PlayStation 4, iOS, Android, Oculus, and Fire Devices. Will any later version of Kindle app allow Calibre to remove DRM? Kindle 1.17.1 will no longer work on Mac when next version of MaC OS is released this fall.
I am using Kindle v1.17.1 and current version of Calibre will remove drm and give me an epub format.