“iCloud documents are cached on your local machine so that you can open them even if you don’t have Internet access. The files can be accessed in the Finder in addition to the Apple application dialog boxes,” William Servator reports for OS X Hints. “You can access them at this location: ~/Library/Mobile Documents/”
MacDailyNews Note: How to access your iCloud files from your Mac’s Finder:
1. In Finder app’s Go” menu, choose “Go to Folder…” (Shift-Command-G)
2. Go to the folder: “~/Library/Mobile Documents/”
That’s it, there is no step 3.
kirkmc adds, “If you move a file from one of these application folders to the Trash, you’ll see a dialog informing you that this also deletes them from iCloud, and asking if you’re sure that you want to delete them.”
More info via OS X Hints here.