download dari https://www.gnome-look.org/p/1201564.
Extract ke folder ~/.local/share/plank/themes.
tekan CTRL + right-clicking the dock > Preferences > Appearance >
Theme: Deafult-MAC THEME(ROUND) > close.
kalau ada garis yang mengganggu
start menu > Window Manager Tweaks > Compositor > uncheck the option Show shadows under dock windows > close.