Hi everybody, newbie here. I have a problem trying to synch my iPhone 5S to my Macbook. Every time I synch my phone it gives a message "ITunes could not connect to the phone "raffyosIP5S" because an invalid response was received from the device" I searched the internet and one of the suggestion was to upgrade my OS to the latest one. I tried "Software update" but it says my software us updated. My Macbook is currently on OS X 10.6.8. I tried to upgrade to Sierra but one of the requirements is an OS X 7.0 or higher. I tried updating to OS X 7.0 but I can't seem to find it even on app store. Please help... Thank you!