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lenovo g50 70 i3 4030u 8gb ram intel 4400 , r5 m230 gpu which version of mac os will my laptop support ?

It does not work . Some portion of my laptop screen is damaged and the black spot on it gradually spread over the screen See in the pic . But i don't think that ,it cause the problem ,because it works fine before i install sierra on it i.e in windows .

Hi there , I done all tax providing above, everything is working fine. But the brightness is not working , the brightness key in my keyboard is working but it can't control the brightness level . I go to the system pref >display and trying to control the brightness but it did not...