The end result
We got Automator to batch-process a group of photos and output the copies to the desktop. We used a variety of actions including a prompt to select which photos to process, an image resize and a change of format. Adding the suffix ‘800’ to the filenames of photos we ran through Automator’s Image Resizer meant we were able to identify which photos had been worked on, without having to click on each one to check its file size. If you use the Folder Actions watch folder instead of initiating photoprocessing on demand, you can specify an output folder, too.
Because it’s so easy to use, you’ll find other tasks you can automate on your Mac. For all but the simplest workflows, we recommend running the script as you add elements to the workflow list. It also makes sense to use dummy files for your test.