Good evening, I have the same problem here. When I try to synch with my iphone I can't see no more the synch button. Any clue? I suppose you have the version 4 and Yosemite. Apple changed the display of buttons in Yosemite and so the button to validate is barely visible but it's still there and if ...

Good evening, I have the same problem here. When I try to synch with my iphone I can't see no more the synch button.
Any clue?

Thanks