Scapple
literatureandlatte.com
literatureandlatte.com
If you want an outline organizer then use something like iThoughts or XMind.
Edit: just went over to the forums and read this exciting tidbit:
“ Scapple 1.4.1 is also a milestone in two ways:
A swathe of the core code has been updated from Objective-C to Swift, Apple’s modern programming language. The changes we’ve made in the background pave the way for Scapple’s future.
This is the first Mac release that I didn’t code entirely myself. In fact, the entire update and Swift changes are down to our new(ish) coder, Ian.”
Your "Mac/Win only" comment notwithstanding, I'm pretty sure Literature & Latte said something to the effect of "We haven't released any updates because Scapple does everything we set out to make it do."
I wish more developers took that approach.
The initial realization of the inevitability of bit-rot as the world changes over time was pretty frustrating for me.
In this case, I'm perfectly confident that Scapple will be updated to e.g. stay compatible with macOS. But, they aren't going to turn it into something it's not. Scapple knows what it's for and it does it well.
That doesn't sound like maintenance mode to me. https://www.literatureandlatte.com/scapple/release-notes?os=...
I’m in goetta country myself.