Sometimes your Mac and iOS devices go out of sync. Take Safari for example. Sometimes your open tabs, history and/or bookmarks just won’t sync with your iPhone or iPad.
Luckily there’s a hidden Safari Debug menu which you can use, among other things, to force sync your iCloud content manually.
ALSO READ HOW TO: Enable the Debug Menu in Reminders and Force a Manual Update
1. Quit Safari on your Mac
2. Open Terminal
3. Type defaults write com.apple.Safari IncludeInternalDebugMenu 1
4. Hit return ( enter )
5. Now load Safari and you should see the Debug menu
NOTE: to hide Safari’s Debug menu, type the following command defaults write com.apple.Safari IncludeInternalDebugMenu 0