joker00 said: I'm finding some apps do crash if this is added...or I just don't know how to make the change for them.

Good example is MS Word. Click to expand...

/path/Applications/APPname.app/Contents/Info.plist

(or simply drag with mouse/trackpad the plist file path and drop into the Terminal window)

As suggested by @Troy2000 , the app you intend to force drawing dark, should have been compiled using the most recent SDK, if so, try to delete (take a backup first of the "_CodeSignature" folder and "Info.plist" for safety) thefolder inside the app package'sMaybe after editing the plist, a file permission fix could be required, from Mojave Terminal type:and as @ASentientBot pointed out, be sure when editing your app "Info.plist" that is in plain text and not binary encoded, in the second case you need to convert in xml and re-convert in plist.edit:It has been also explained here: https://developer.apple.com/documen...n/choosing_a_specific_appearance_for_your_app