Other "Trust this computer" dialog on EVERY connect

[Brien]

I get the "trust this computer?" dialog (and passcode thing afterward) every. single. time. I plug my iPhone (7 Plus, iOS 11) into my MBP (running El Capitan).

Please someone tell me how to fix this.

 

[xraydoc]

Upgrade to Sierra or High Sierra.

 

[Brien]

You wanna buy me a new MBP then?

 

[jav6454]

I get the "trust this computer?" dialog (and passcode thing afterward) every. single. time. I plug my iPhone (7 Plus, iOS 11) into my MBP (running El Capitan).

Please someone tell me how to fix this.

Wierd, I don't have that issue in my Late 2008 MacBook.