The previous solution does not seem to work in the latest version of Automator, as the actions seem to have changed. Here's what I did:
- Open Automator and create a new Workflow
- Drag the PDF(s) you'd like to split into the right pane
- In the sidebar, under Library, click "PDFs"
- Drag the "Split PDF" line into the right pane
- Change the output location if desired
- Click Run in the upper right
You should see files in the specified output location named "[OriginalFile]-page1.pdf," "[OriginalFile]-page2.pdf," and so on.