"The IPhone “Xxx Xxxxx” cannot be used...requires a newer version of ITunes...."

When I try to connect my IPhone to my MacBook; I receive the message " The IPhone “Xxx Xxxxx” cannot be used because it requires a newer version of ITunes...." My IPhone came pre-installed with IOS 9.2.1. My laptop is running OS X version 10.6.8. The phone is up-to-date and I've updated iTunes on my computer--the info reads 'This version of iTunes (11.4) is the current version.' The message '...cannot be used...' persists. Thank you for any help! I'm so frustrated.