iCloud documents "waiting"
Upgrading to iCloud Drive is a one-time, irreversible action. You can not go back from iCloud Drive to Documents &amp; Data—your Apple ID has been permanently upgraded.


  Migrating to iCloud Drive will disable Documents &amp; Data syncing for your iCloud account on OS X Mavericks and earlier Macs, as well as iOS 7 and earlier devices.


Source: OS X Yosemite release notes