iphone 6s wont sync with itunes 11.4
i have an old macbook 4,1 with itunes 11.4 which is uncompatible with the newest OS X software so cannot update. When i plug my new iphone 6s in to sync up to my itunes, it says it doesnt support this old version of itunes, but i cant update it!!
Is there any way around this to get my music on my phone???
iPhone 6s, iOS 9.0.2