I have seen this theme, I installed it, but it still looks pretty different from the promises (look at the picture). As you can see my result (on the right) is pretty different from promised version (on the left). Does someone ever tried with a real success this themes and how?
Several things are responsible for what we see on screen:
The "gtk" theme affects most of the window that you see in your program except for regions such as the title bar, the maximize/minimize/close buttons (to the left or right of the title bar), and the thickness and color of windows borders.
(I maybe stating the obvious here but you need to make sure that you're installing the GNOME theme that is appropriate to your GNOME version. Of late, there have been significant changes in the GUI of GNOME apps. The theme you linked to has been updated to accommodate GNOME 3.6.x.)
What you have installed is the gtk theme. So, only specific aspects of your program's window are affected. If you want the "whole appearance", you may have to download the relevant icon theme and possibly even a window manager theme. I'm afraid you'll have to do this on your own by contacting the gtk theme's developer and asking about the icon theme and the window border theme. The link you provided has some information on this.
I have also tried to get the exact publicized theme appearance for Gnome Cupertino. A trick that you can try out is to edit/customize the .css files according to your own liking:
cd /usr/share/themes (or the installation directory for the desired theme) cd Gnome-Cupertino-unity/gtk-3.0
Now edit the contents of the file gtk.css, the file contains some elementary instructions to tweak certain parts of themes.
Assuming you downloaded the theme and copy pasted the gnome-cupertino folder in
/usr/share/themes
,this is what you have to do next:The file manager used in left screenshot is Marlin.To install it,use these commands
Next you need to apply Elementary icon theme(this is used in screenshot!).Commands are
Now Gnome-Cupertino is fully applied :)