iMac (Retina 5K, 27-inch, Late 2014)
3,5 GHz Intel Core i5
24 GB 1600 MHz DDR3
AMD Radeon R9 M290X 2048 MB
problem in the braking system by increasing the image, the entire screen.
graphics card settings in ligntroom exposed (opengl)
apparently judging by the processor is loaded utiltite.
Photoshop while working fine and the processor is loaded to a minimum
Please help me with a problem please ...