Recovering Erased/Reverted Project File

This is a very dense subject but the quick answer is to look into the Audio Files Folder. Did you save your session as a Package or Folder? Folders look like this:

If you saved as a Package, ctrl+click and select "Show Packaged Contents". The assets should be in there.

If your session is missing files, Logic Pro usually prompts you to locate missing files. Not sure if this is applicable when you revert though. Hope this helps!

And I like to add some general tips.

• Create backups. Create backups. Create backups.

You can use the built-in Time Machine to create complete backups of your entire software environment. Get one (or better two on different locations) cheap, reliable hard drives with the double size of everything you like to backup.

• Use a decent application for finding files on your computer. Although there is the built-in solution Spotlight, I don't use it when I have to look for some (really) lost files, because it does not look everywhere. I'm using NeoFinder which is pretty fast depending on your settings, and I was using EasyFind which can be pretty slow. However, both apps look everywhere.