Why can't the iMac's backlight be turned off?


macrumors 604
Original poster
Sep 17, 2009
Melbourne, Australia
Apologies if this has been asked before, but does anyone know why the iMac's backlight can't be turned right off like the backlight of MacBooks can?

Thank you very much :)


macrumors 6502a
Apr 10, 2012
Dimming doesn't work, that's what F1 and F2 keys are for. I am not sure if there is support for it with built-in display or any other display. It'd make sense if the OS would remap these keys for display brightness for desktop computers.

I also don't think the system would allow you to remap F1 key for that particular keyboard combination (maybe Keyboard Maestro could do it but not worth the price IMHO).