10.7: Use iCloud to automatically sync files across Macs: iCloud's 'Documents in the Cloud' doesn't let you do much except upload iWork files for use with iOS devices. To use those documents on another Mac, you have to download the file using the iCloud web interface.



Poking around in the ~/Library folder, you can find a 'Mobile Documents' folder that is used for syncing iWork documents. But it turns out you are not limited to iWork files if you just want to sync between Macs (i.e. no iOS use).



If you are using iCloud and have the 'Documents & Data' option selected in the preference pane, you can navigate to ~/Library/Mobile Documents. Depending on whether or not you've used iWork and synced documents to iCloud, you may or may not find folders there for each of the iWork applications (e.g. com~apple~numbers).



This doesn't really matter. What is of use is that any files put into the ~/Library/Mobile Documents folder will automatically upload to iCloud and push to any other Mac you have ...