I’ve installed ubuntu mate 18.04 using minimal install option on my computer. Everything works superb so far, it’s just that the themes use gtk2 instead of gtk3, which I know for a fact, since I deleted a gtk-2.0 folder from one of the themes and it no longer appeared in the Customize menu.
I’ve read that Mate is now gtk3 by default, but I don’t really know why the theme customization menu only displays gtk2 themes, which is weird, since this command: “dpkg -l libgtk2.0-0 libgtk-3-0” shows both installed on the system.
I haven’t come across that myself, but my guess is that it’s only showing themes that include a GTK+ 2 component since most people still want a theme to include both. Technical differences mean that themes for GTK+ 2 and 3 are completely different, just they are usually written to look as similar as possible for the same theme.
Hi @tomiyou,
it may be that the themes/apps haven’t been ported to GTK3 yet and still need GTK2 support to work as intended?.