Ubuntu 24.04 custom themes

Question

I started with a new Ubuntu 24.04.1 install on a Dell Latitude 7400. When trying to install a custom theme following this https://ubuntuhandbook.org/index.php/2020/01/install-mac-os-mojave-theme-ubuntu-19-10/ the theme was not working with several applications such as Nautilus, Firefox. When trying to go back to the default Awadita applications the window border became transparent and the window management buttons were hardly visible. I found one piece of information on the net saying that with moving to gtk4 themes are no longer supported. Is this true? If not, how do I install a custom gtk4 theme and have it available with all applications?

Answer 1

First, install the dependencies

sudo apt install libglib2.0-dev-bin git

Download the theme with

git clone https://github.com/vinceliuice/Mojave-gtk-theme

Now, open the theme directory in terminal

cd Mojave-gtk-theme

Now, install it with libadwaita support

./install.sh --libadwaita