iCloudStatus is the missing piece of OS X 10.10 Yosemite that shows a status icon for iCloud Drive right in your menu bar so there's no more digging around in the Finder to see when your files have been uploaded. When you add files to iCloud Drive, iCloudStatus will stealthily detect the changes and show you how much progress has been made, then notify you when it's finished. Clicking on the iCloud Drive status icon brings up a popup window containing other useful information such as:

• List of all active transfers and their current progress
• History log of all transfers so you know what files where transferred when
• Optional preferences such as a notification when transfers are complete.