I have a early 2015, 11" MacBook Air and an iPhone 6s running iOS 12.1.4. On my MacBook, I am using Photos App Version 4.0 (3421.5.230).
I open Photos.app, connect the iPhone via USB, select Import all new items, and the MacBook will start, then hang up on the import just sitting there for hours.
I have run First Aid ran and have updated all the devices and app but to no avail.
What else should I look for to resolve the issue?