Everyone complains about how long it takes to backup their iPhone when syncing, (it takes a while for me to but I try not to complain too much). The first solution to this problem that I would suggest is taking some applications off of your iPhone, the apps on the phone the longer it will take to backup.
The second solution to this problem is to disable it through the command line. Before I tell you how to do it though remember that you will no longer have a backup of your iPhone on your computer, so if something terrible happens and you have to do a full restore you won’t have that backup to fall back on, all of your settings will be lost and all of the saved data from your apps will be as well. But, if you are willing to deal with all of that and you are still willing to go through with it here’s how to do it.
- Quit iTunes
- Open Terminal.app
- paste this into the window and hit return:
defaults write com.apple.iTunes DeviceBackupsDisabled -bool true
- Open iTunes
- Plug in your iPhone and sync to your hearts content
Changing “true” to “false” in the command above will turn backups back on.