today when i operate my mac, i see two light and thin lines on my mac screen. i restart and shutdown mac but lines is not disappeared . can anyone tell me about solve and diagnosed this problem!
MacBook Pro with Retina display, macOS Sierra (10.12.4)
Those are indicators of either display problems, or screen-buffer problems.
Take a screenshot, such as with Command-Shift 3. Open the screenshot (with Preview).
-- If the problem DOES show in the screenshot, it is a screen-buffer memory problem.
-- If the problem does NOT show in the screenshot, it is strictly a display problem.
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vertical lines on my mac screen!!!
