I just imported from a CF Card images (Mac, El Capitan). The images looked ok although grayed out a little too much in the UI, imported OK into my library, however, NO previews are showing - the preview to totally BLACK -
First time in 8 years of LR that I've had upgrade issues, PLEASE HELP
moving to Lightroom forum for assistance
The new import dialogue is complete rubbish, I can not believe why Adobe wants to backstab their Lr-customers this way.
Try downgrading to Lr 2015.1.1: