See link below on streaming from iPhone/ iPad / Mac Pro through an external USB input DAC etc.
Substitute your own DAC (with a USB input) for the AQ DRAGONFLY Red DAC in the link article
You will need some more link components first .
(1)buy the intermediary APPLE Lightning-to-USB Camera Adapter coming out from the MAC AIR
(2) buy a quality - build suitable USB cable (don’t chintz it here ) to link the APPLE CAMERA adapter to the suitable input into your external DAC
(3) Buy a quality- build cable for DAC output (don’t chintz it here either ....) from your external DAC to the suitable input to your preamp .....
https://www.wifihifi.ca/LatestNewsHeadlines/Hands-OnReview:AudioQuestDragonFlyBlack1.5/Red.html
Substitute your own DAC (with a USB input) for the AQ DRAGONFLY Red DAC in the link article
You will need some more link components first .
(1)buy the intermediary APPLE Lightning-to-USB Camera Adapter coming out from the MAC AIR
(2) buy a quality - build suitable USB cable (don’t chintz it here ) to link the APPLE CAMERA adapter to the suitable input into your external DAC
(3) Buy a quality- build cable for DAC output (don’t chintz it here either ....) from your external DAC to the suitable input to your preamp .....
https://www.wifihifi.ca/LatestNewsHeadlines/Hands-OnReview:AudioQuestDragonFlyBlack1.5/Red.html