Hi. I saw the announcement of the release of 3.5.12. If I follow the link in the post, I get to this page, where 3.5.12 is the download proferred:
But, if I follow the Check For Updates menu item in Dorico, I get taken here, where no update is shown past 3.5.10:
I am running 3.5.10 on Mac Mojave.
I thought you might like to know.
Best wishes