Premiere Pro CC won't import exported image from Lightroom
Chances are very good that you are presently running the initial version of El Capitan (OSX 10.11).  The work-around suggested by Adobe is to change Premiere's Mercury Rendering engine from GPU to CPU (software-only).  That really wrecks rendering performance, but it does solve the problem.

Chances are also very good that if you install the update (OSX 10.11.1) the red-and-yellow pixel stripes will go away, even with the Mercury Rendering engine set to GPU (OpenCL).