How do I delete old versions that are taking up huge amounts of my storage in iBooks Author on Mavericks.
I have created a photobook in iBooks Author and I used to be able to delete the old versions that took up a huge amount of storage. But with the upgrade to Mavericks I don't seem to be able to do it the same way (enter 'Revert to', 'Alt' click the triangle next to the file name and select delete all versions). I have about 32GB being used up at the moment and would rather not have it that way. Has anyone got any tips?
iBooks Author-OTHER, OS X Mavericks (10.9)