What I miss the most is a workable "focus follows mouse" solution.
Circa Snow Leopard, I used "mondomouse" but that is abandonware and does not work.
I tried to use "dwellclick" but it's not a good solution.
I think there are now some new accessibility settings that actual enable a proper focus follows mouse in Mojave and later, but I don't have anything later than El Cap installed and am unable to test that ...
I've looked into this and the focus-follows-mouse part isn't actually all that difficult; there is SPI to do this. The difficulty is that picking what things should get focus is hard, because there are things in macOS that actually care about what is focused. For example, as I was running my test, from Xcode of course, I moved my cursor over the sidebar, which changed the focused item as I moved my mouse…of course, this had the effect of opening a different file. If anyone has any ideas on how do deal with this, I'd be happy to hear it!
Circa Snow Leopard, I used "mondomouse" but that is abandonware and does not work.
I tried to use "dwellclick" but it's not a good solution.
I think there are now some new accessibility settings that actual enable a proper focus follows mouse in Mojave and later, but I don't have anything later than El Cap installed and am unable to test that ...