[tomsem]

I have been running the Kindle for Mac beta for several months now. It's very much like the iPad app, which I like (immersion reading, supports series grouping, collections, X-Ray, personal documents etc). I don't know of any reason why they would not roll it out to Intel Macs as well provided they're running a compatible version of macOS. Catalyst doesn't restrict it. To the extent it requires specific version of macOS, older Macs presumably would continue to run the existing app.

I'll repeat that 'I did no notice a link to Your Books'. Which is to say I'll try to look for it next time I purchase. I typically just close the page right away, so it's entirely possible it is there and I just didn't see it.