I found a theme that I wish to run, and it says that is is meant to run on Gnome 3.12. It says:
Important note: This theme is designed for Gnome 3.12. May or may not work with other versions of Gnome-shell and GTK.
First of all, the difference between Gnome and GTK is fairly blurry to me still. From what I understand, GTK is the toolkit for which Gnome is built with. I also am not even sure that Ubuntu uses Gnome in any form. Doesn't Ubuntu use Unity instead of Gnome? Or does it use Unity AND some Gnome stuff? I do see some miscellaneous packages in Synaptic that look like Gnome-*.
Anyway, I want to use this theme on Ubuntu 14.04 LTS. My OS is up-to-date, and I have recently ran
sudo apt-get update and
sudo apt-get upgrade which I believe upgrades all packages to their most recent version.
libgtk-3-bin packages says that I am running 3.10.8. Shouldn't the
libgtk stuff be 3.12 since I ran the
sudo apt-get upgrade command?
How do I update GTK and/or GNOME so that I can use this theme?
Theme: Zukitwo on Gnome-Look.org
Please note I am using a fresh Ubuntu 14.04 LTS install (not Ubuntu GNOME). I have not installed any desktop environments, which means I am using Unity. Everything is up-to-date according to Ubuntu Software Center.