Recovering a previous version of a OneNote page on a Mac is a straightforward process. Here are the steps to do it:

1. Open the OneNote page containing the version you would like to recover.
2. Choose the History option from the menu bar
3. Select the version of the page you’d like to use.
4. Click on Restore this Version.
5. Confirm your restore action.
6. The previous version will now replace the current version.