Much easier: switch to the Sequoia public beta channel!
Exactly. I was going to write this. The "beta" channel, once RTM, becomes the release channel of that version.
I'm curious about what updates will get pushed through that channel. Is it just RTM updates, or will it also include beta updates? It's currently offering 15.7.5 through that channel.
Thanks for the idea. Now MacOS is happy and so am I.