How can I add a comment in the script in Automator in OS X? I've tried many variants but they don't work.
Based on the crickets chirping here, I'm going to guess that there are no built-in non-acting actions. There is a simple workaround, however:
Create a comments-only script
If you don't like the
# syntax, there's also bash multiline syntax…
…or for a more muted effect, the
Run Applescript panes use gray for comments…
Of course, any time your compilable "comment scripts" haven't yet compiled—such as just after opening—you'll get a lovely shade of purple instead of gray. Which could be kinda cool, depending on your preferences.