A model can be reverted to the last saved or last opened status, or a version at a given date and time.
When a model has unsaved changes:
Select File > Revert To > Last Opened or Last Saved.
Close a model and click
.The model reverts to Last Saved.
If you want to revert a model to a version at a specific date and time:
Rhino 6 for Mac © 2010-2020 Robert McNeel & Associates. 11-Nov-2020