I want to connect an iPhone 6 to my 2016 12" MacBook.
I have a USB-C to USB-A adapter. If I connect the iPhone, macOS shows a warning (translated):
USB device requires power (Note: It just says power, not more power). Original text is (German):
USB Zubehör benötigt Strom. The iPhone is neither recognized by iTunes, nor does it charge.
The MacBook was connected to power supply via: MacBook USB-C to USB-A to USB-C MacBook power pack to power outlet. (My USB-C to USB-A Adapter has 2 USB-A outputs, so basically one output goes to iPhone, one to power supply).
How do I resolve this issue?