FWIW, I'll just mention here that when you select Save… from the Actions drop-down menu to save a selected set of actions, the default folder is, in fact
~/Library/Application Support/Adobe/Adobe Photoshop CC/Presets/Actions
So if you want to yank out your beloved actions from the fortress of
Actions palette.psp
that's how to do it.
Also, if you want to Load… actions from the drop-down menu, it also first looks at
~/Library/Application Support/Adobe/Adobe Photoshop CC/Presets/Actions
Another useless tidbit: The Export/Imports Presets… menu:
Edit > Presets > Export/Import Presets… will look at that folder to find Actions to Export from (not that you couldn't copy it but then you have to know how to find it) if you've put any in there.