With my Samsung Tablet I can use AFT with my MacBook running El Capitan. My LG V10 cannot. I installed the USB driver that comes with the phone's installer. The phone can connect to the Windows bootcamp on the same laptop. I thought I had changed some setting by accident so I factory reset the phone. Still a no go. I enabled the Developer Options as well.
It should just connect and work.
It should just connect and work.