How to install pamac?

[kqlnut]

==> Checking runtime dependencies:
==> Missing dependencies:
    -> libpamac-aur>=11.2
==> Checking buildtime dependencies...
==> ERROR: Could not resolve all dependencies.

As the name suggests, libpamac-aur is an AUR package which has to be built manually itself (with it's own PKGBUILD). Since it's not in the repos, it can't be automatically installed with makepkg's --syncdeps flag. So get the PKGBUILD for libpamac-aur first, build and install it with makepkg -si and then repeat for pamac-aur.

Were there 19 conflicting packages or just 19 missing dependencies that were then installed? If they were actual conflicts with already installed packages, you should take a closer look there (post the command's output here if you are not sure).