Apple does provide these instructions, although they were annoyingly hard to find (in no small part because the page title is only incidentally related to the task).
In short:
- File > Library Properties (⌃⌘J).
- Click “Modify Settings” next to “Storage Locations”.
- Set the “Backups” option to “Do Not Save”.
My projects are already covered by Time Machine and other backup mechanisms, and I tried to tolerate Final Cut Pros built-in backup system, but the damn thing runs so often, which I know about very well because whenever it runs Final Cut Pro becomes completely unusable for several minutes. It’s immensely irritating when it kicks in while I’m in the middle of editing.
