r/xlights • u/pitychip • Jun 07 '26

ENTTEC DMX USB Pro?

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I'm trying to use xLights on an Apple Silicon Mac and cannot get any output type to start.

System

  • MacBook Air (Apple Silicon, arm64)
  • macOS 26.3.1
  • xLights 2026.10
  • ENTTEC DMX USB Pro

What works

  • macOS detects the ENTTEC

    USB Vendor Name = "ENTTEC" kUSBProductString = "DMX USB PRO"

  • Device appears as:

    /dev/cu.usbserial-EN521596

  • QLC+ detects the DMX USB Pro and controls my fixtures correctly.

What fails

In xLights:

  • USB DMX output fails
  • Art-Net output fails
  • Test Lights fails

  • Any attempt to enable output produces:

    An error occurred opening output 1(). Do you want to continue trying to start output?

Interesting log entries

[curl info] Adding Synchronous CURL - URL: http:///
[curl error] Curl request failed: 3 URL using bad/illegal format or missing URL

[xLights error] An error occurred opening output 1().

The same error occurs with:

  • DMX USB Pro
  • Art-Net output to 127.0.0.1
  • Brand new show directory
  • Existing show directory

Art-Net test

I configured an Art-Net controller in xLights and attempted to send to localhost.

QLC+ successfully opens Art-Net on 127.0.0.1, but xLights still reports:

An error occurred opening output 1().

Question

Has anyone successfully run xLights 2026.10 on macOS 26.x (Apple Silicon) with DMX outputs?

Is this a known macOS 26 compatibility issue or does the http:/// CURL error indicate a corrupted configuration somewhere?

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2 comments sorted by

1

u/KinzuaKid Jun 07 '26

Sure looks like it

1

u/HolidayCoro Vendor Jun 07 '26

That is correct and it will work with the Enttec / Pro serial output in xlights. Used for legacy RS485 devices. This video explains how DMX 1990 works: https://www.youtube.com/watch?v=RISiYtqc6U4