I realize that Dark Mode was implemented to interface with the Mojave system-wide implementation, but does that mean it’s only accessible if you have Mojave? I have Scrivener 3.0.9 and macOS 10.13.6 on a mac Mini that is just old enough I can’t upgrade to Mojave. (If Apple announces a new mac Mini on the 30th, I will be getting one next year.)
That was what I was afraid of, but it’s completely understandable – you can only work with the tools you are given.
I would go look for a used 2014 Mini but we’re in the final days before our house closing, AND holidays are coming, AND the Sounders have playoffs coming so we are cash poor and what little there is goes to playoff tickets. And by then hopefully Apple will have 2018 Minis out and I’ll just have to budget for one next year.
Well, there is a patcher tool to enable installing Mojave on Macs that are not officially supported. (Link removed.)
The site lists the machines that can be patched and any remaining issues.
I have not tried this for Mojave, but I did use a previous version of the tool to install Sierra on an old (late 2008), unsupported MacBook, just to be able to use Scrivener 3. That worked fine, but does not of course guarantee that the Mojave patcher will also work for you.