Sync Gmail Contacts with iPhone, iPad, and iCloud - Online Tech Tips: "I use my Mac a lot and one of the annoying problems I’ve always found is that when using the Mail app, I don’t get the autocomplete for my Gmail contacts. I have a bunch of Gmail contacts and unfortunately, none of them show up when I start typing a new email in Mail. Mail uses the Mac Address Book and if the contacts are not in there, then you won’t have access to them in Mail."
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