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M1 Mac does not support DDC/CI

The DDC/CI application can work well on MacbookPro/Mac Pro (Big Sur), but it doesn't work on M1 Mac (both macOS 11.0.1 and 11.1). M1’s graphics card is Apple, not Intel or AMD. Does this incompatible issue relate with new graphics card or kernel change? Any alternative solution for M1?

MacBook Pro

Posted on Jan 4, 2021 6:26 PM

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Posted on Jan 11, 2021 1:00 AM

From the ddcctl thread on Github, it seems that M1 Macs don't currently expose the I2C interface for the M1 GPU framebuffers.

kfix/ddcctl#86 and https://github.com/alin23/Lunar/issues/210


Right now there's no way to tell the GPU to send arbitrary DDC messages to the monitor.

Rosetta emulation isn't helping here.

Apple, please help.


DDC/CI is a pro feature, some people really need.

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Jan 11, 2021 1:00 AM in response to Clement_Fan

From the ddcctl thread on Github, it seems that M1 Macs don't currently expose the I2C interface for the M1 GPU framebuffers.

kfix/ddcctl#86 and https://github.com/alin23/Lunar/issues/210


Right now there's no way to tell the GPU to send arbitrary DDC messages to the monitor.

Rosetta emulation isn't helping here.

Apple, please help.


DDC/CI is a pro feature, some people really need.

M1 Mac does not support DDC/CI

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