How to adjust the brightness of Apple Mac computer screen

1, in fact, look closely at the Apple Mac notebook keyboard, or the imac with the Apple Bluetooth keyboard you should be able to find the answer, F1 above marked with brightness of the small icon, meaning the brightness of the lower button, F2 above marked with a larger brightness of the icon, meaning the brightness height button.

2, if not, then with the left lower corner Fn key to try, FN+F1 is to adjust the brightness, fn+f2 is to adjust the high brightness.

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