This is an experiment on theming nautilus (the file-manager in gnome) on the basis of my other theme: gnome-OSX
Look at the screenshot: you will see the transparent sidebar going all the way into the headerbar.
This is a visual trick however: The headerbar-background is aligned with the sidebar-background.
1. This is gnome-desktop 3.20+. Install this theme on it.
2. Absolutely necessary is to put the buttons to the left, so open a terminal:
gsettings set org.gnome.desktop.wm.preferences button-layout "close,minimize,maximize:"
3. Resize the sidebar all the way to the left (minimal). This way it should aligne with the headerbar.
Only Nautilus is themed differently, the rest will look like Gnome-OSX.
As I said: it is an experiment. If you resize the sidebar to the right it will not work...
I need help though ! Who can tell me how to make it so that nautilus sidebar cannot be resized, or into a fixed pixel-size?...
re-uploaded right version 4 days ago
re-uploaded right version