I'm trying to install plantuml-mode based on the instructions here:
I'm told to try the following:
M-x package-install<RET> plantuml-mode<RET>
But the package isn't found:
Contacting host: elpa.gnu.org:80 Failed to download ‘gnu’ archive.
However, it is listed here on MELPA:
I don't have much experience installing things in Emacs. Is there some fool-proof way to get this installed on my mac, possibly with a 'recipe'?
I do have plantuml installed.