iTunes won't connect my new iPhone
I've just bought a new iPhone 6s and tried to connect it to my iTunes so I can transfer my music, apps etc. onto it.
When I plug my iPhone into the computer via the USB socket, a message on my iTunes pops us.
It says my iPhone cannot be used because it requires a newer version of iTunes. It then says I should visit www.itunes.com to download the latest version.
My iTunes version is 12.2.2 which I believe is the latest version.
I've tried turning my iMac and iPhone off and on again but no change.
I would appreciate any advice on this matter. Thanks in advance.
iMac (27-inch Mid 2011), Mac OS X (10.7.5)