Verified reports
The answer can change with a different Mac or a different port.
| Mac | Connection | Volume | DDC reads | macOS |
|---|---|---|---|---|
| Mac mini (M4) | Built-in HDMI | Works | reads broken | 26.3.1 |
Mac mini (M4), Built-in HDMI: Every VCP code reads back 110 and max volume reports -128, but writes land reliably and audibly. Needs a write-only tool.
Check your own setup
Same monitor doesn't guarantee the same result — the port matters as much as the panel.
$ curl -fsSL https://raw.githubusercontent.com/shravankb301/willitddc/main/check.sh | bash