Q: Can't Backup Ipad to Macbook Pro

Can you elaborate a bit more. What happens when you try to backup to your Mac? What messages do you get? That info would help in diagnosing the problem. In the mean time try a hard reboot.Hold down the Home and Wake/Sleep buttons at the same time for about 15-20 seconds until the Apple logo appears. Ignore the "Slide to power off" text if it comes up. You will not loose anything. Also reboot your Mac. Does it recognize your iPad? If not: If you don't see your connected device in iTunes for Mac - Apple Support

This might be helpful.

If you can't make an iTunes backup of your iPhone, iPad, or iPod touch - Apple Support