I have the same problem, and had not been able to resolve it. When I connect the very same iPhone, with the same cable, but trough a USB 3.0 hub connected to the Macbook, the iPhone gets instantly connected without any issues.
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I have the same problem and had not been able to resolve it.
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When I connect the very same iPhone with the same cable, through a USB 3.0 hub connected to the MacBook the iPhone gets connected instantly without any issues.
I have the same problem, and had not been able to resolve it. When I connect the very same iPhone, with the same cable, but trough a USB 3.0 hub connected to the Macbook, the iPhone gets instantly connected without any issues.