How to DeAuthorize a Phone to a Computer

[bLaZ3n]

Originally with this MacBook there are 3 iPhones 5's that sync with it. The owners of 2 iPhone's recently got new computers, so I no longer need them to sync with my computer.

I sycned them with the new computers already, but for some reason when those phones are plugged in (sync through wifi), they still pop up in my iTunes.

 

[McGiord]

In the iTunes Menu, select preferences, then Devices, and delete the backups if you want to.
When you plug them in, define how they will sync. Disable the auto sync for each iPhone.

 

[bLaZ3n]

In the iTunes Menu, select preferences, then Devices, and delete the backups if you want to.
When you plug them in, define how they will sync. Disable the auto sync for each iPhone.

Don't need to delete the backups. Will keep just in case.

But disabling the auto sync feature messes it up with the new computer. I basically, want those other iphones to only operate with the new computer, mine is no longer needed to sync or store any information.