I've never been able to sync Addressbook on my iMac and Contacts on my iPhone, nor have advisors at my local Genius Bar been able to figure out what the problem is.
I have an iPhone 4s, and an iMac still on Os X 10.6.8 (because I was advised that with the 4GB RAM of my 2008 iMac, upgrading to the OS versions from Lion onwards would slow up my machine).
My iMac being on 10.6.8 excludes the use of iCloud for syncing my iPhone with my iMac. So I continue to do it through iTunes.
With the iPhone linked by cable to my iMac I click on "Automatically sync when this iPhone is connected" clicked, and under Info click on Sync Contacts, with "All contacts" selected.
But no such syncing happens.
Instead, Contacts on my iPhone gets synced with some version of an addressbook on my iMac which derives from the days when I used to back up my Nokia 6300 via Bluetooth, and which seems to have been enriched since with the further contacts I've been putting into my iPhone. This happened when I had an iPhone 4, and has been happening since I've had an iPhone 4s, so it isn’t some fault with the phone
The problem not only means that I can't carry the contents of the Addressboook on my iMac with me on my iPhone. It also means that any new contact I put in my iPhone doesn't appear in the Addressbook of my iMac after I've done the syncing between my iPhone and my iMac; nor does any new contact I put in the Addressbook of my iMac appear after in Contacts on my iPhone after syncing with my iMac.
It's also been impossible, either for me or for the tech tech adviser at my local Genius Bar who has tried, to find on my iMac the mysterious version of the addressbook, with which my iPhone Contacts seems to be syncing.
I'd be really grateful for any help with this.