There was a message on the iPhone asking me if I trusted my computer [iMac]. I said yes. What's that about?

By the way, I used iTunes to update the iPhone and over the air to do the iPad. iPad was three times faster and completed first even though I started it a good 5 minutes after I did the iPhone.

I had repaired permissions on iMac several times but do not understand the results. Each time it said it found something amiss, and directly under that it would say repaired. Many of the noted changes or fixes were with iTunes. The results contained two or screen loads of that info. It seems it never really did repair anything. Yep, I rebooted and did it again with same results.

Anything else I should try?