Can I sync iPhone without backing up?

When the backup begins, try clicking on the x in the progress window at the top of the iTunes screen. That used to work, but I have not tried it in a few years.

1. - Quit iTunes.

2. - Open Terminal.app

3. - Copy and paste this in, then hit return:

defaults write com.apple.iTunes DeviceBackupsDisabled -bool true

4. - Open iTunes 5.