I just downloaded the 10.3.3 OS for my iphone 5s (I think that is the model number). Anyway, now the iphone and my MacBook are not syncing. I plug in the phone and it asks if the computer can be trusted, and I say yes, and then iTunes says it cannot connect to the phone because of an error response. I also get a message fro iPhoto that says the phone must be unlocked to sync photos from my phone's camera phone, but my phone is unlocked. I am so frustrated. This is why I am nervous about upgrading OS on anything. Can anyone tell me how to fix this?? Thank you in advance.