accessibilitydisplaymacos
In the Accessibility preference pane of El Capitan's System Preferences, I've noticed a "Differentiate without color" setting that I didn't notice before.
Does anyone know to what extent this setting will change the experience of Finder?
I couldn't find much in the help and the only link I found about this was very succinct (I can't believe this setting only acts on the dots of this exemple).
I would love to know exactly how toggling this setting would affect the Mac's OS display, and its apps.
Seems like ChronoSync could help in a limited way. The support pages have warnings on syncing ~/Library. See ChronoSync - Syncing your Home folder.
You could try Unison for everything instead of multiple tools and approaches (one caveat is that Unison was last updated in 2009; it's source is available under GPL though).
References:
Unison Frequently Asked Questions (FAQ)
Using Unison on Specific Operating Systems
I don't fully understand your question but here's my answer on what i think you want to achieve. Make sure you have your display connected when doing the following.
Best Answer
The only change I've found so far is changing the dots in Messages, as some other users have pointed out. I couldn't find any changes in Finder, which surprised me, since Tags would definitely benefit from this feature.
EDIT 1: This book excerpt would seem to corroborate that: https://www.safaribooksonline.com/library/view/os-x-yosemite/9781491948484/ch09s02.html