Still could be considered a work around and may require pirating but this exists
https://github.com/openblack/openblack
I haven’t tried it myself yet though since the setup seems like a bit of a hassle.
I did it on Linux using wine and frustration. I skimmed over this guide and it’s just an old version, not patched, and will work on Mac it seems.
https://www.cloudwards.net/remove-drm-from-kindle-books/
The original dev of the dedrm plugin no longer maintains it and has recommended this fork instead:
https://github.com/nodrm/DeDRM_tools
Just use that I stead of the apprenticeharper version the guide links you to. I haven’t used apple pc’s since the PowerPC processor days so I’m not sure where to safely get old version mirrors of kindle desktop.
Last time I did probably close enough to this (kindle ebook to drm free format that works on anything), I had to use a patched old version of the kindle desktop program together with calibre and some drm removal plugin. The ebook had to be downloaded for the first time with the patched client or you would be stuck with the newer drm that at the time and probably still now hasn’t been figured out.
I have a kindle I got in 2020 and no idea where it is. I also have a Kobo Libra 2 that I take with me everywhere. If you don’t want to constantly battle with jailbreaking get a Kobo. The two books I have on Amazon I transferred on with calibre and dedrm plugin