An Aurorae theme to merge:
While in the clone directory execute this command:
cp -r OSX-Arc* ~/.local/share/aurorae/themes/
If you have trizen (or any other AUR Helper):
<Insert AUR Helper Here> -S osx-arc-aurorae-theme
If you do not:
git clone https://aur.archlinux.org/osx-arc-aurorae-theme.git && cd osx-arc-aurorae-theme && makepkg -si