ddccdl on iMac detects 0 displays

kfix / ddcctl

DDC monitor controls (brightness) for Mac OSX command line

GNU General Public License v3.0

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ddccdl on iMac detects 0 displays #98

Closed HmACK666 closed 3 years ago

HmACK666 commented 3 years ago

I'm excited to see an active project dealing with command line controls for displays on macOS. I use https://github.com/nriley/brightness to retrieve & set brightness in a lab of iMacs (Retina 5K, 27-inch, 2017). While this tool works well on my Mac Pro (5,1) with two Apple Cinema Displays, when run on one of the iMacs I get: I: found 0 external display

Just wondering if there are shortcomings with iMacs displays that would prevent this tool ever working?

kfix commented 3 years ago

the iMac screen is internal and doesn't use DDC, so ddcctl doesn't support it. Same for MacBook screens.

I guess you need to use both tools? I know that sounds weird, but they both are using two very different and finnicky APIs that Apple semi-supports.