View the values of variables in Automator on Mac
If you are debugging a workflow that uses variables, use the Variable log to view the values contained by the variables when the workflow runs.
Choose View > Variables.
The Variable log is displayed in the Log area.
Click Run.
As your workflow runs, the values of the variables are displayed in the log.
To run your workflow one step at a time to see the point where variables change, choose Workflow > Step.