I know there was an issue with this situation that was supposed to be resolved with OS X EI Capitan. But not so in my case. Running OS X EI Capitan Version 10.11.3 on my iMac, OS 9.2.1 (13D15) on both my iPhone and iPad. Curiously, the iPad syncs fine, but not the iPhone 5. I've reset all things numerous times, in and out of my iCloud accounts as well and in conjunction with resets, even changed my iCloud account ID. Still no luck. Any suggestions ?