IPhone 4s won't synch with Macbook pro?

My pictures that I took on my phone will be transferred to iPhoto on my computer, but the music won't transfer. I want to get my music that's on my computer onto my phone.

Added (1). It will say it's synching, then I'll get a message on my computer that says some things (then it lists a few apps) didn't transfer.

Just the music won't transfer from itunes or the phone doesn't sync with itunes

what sort of message do you get when you attempt transfer between itunes and phone?

Try third-party programs like iPhone Transfer to copy iPhone files to your Mac computer.

I use iPhone Transfer software.

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