Resolume Forum

When using multiple Ethernet adapters on macOS 15.6.1, Resolume Arena v7.23.1 detects both adapters under Preferences → DMX → Network Adapter. However, with more than one adapter enabled in macOS System Settings → Network, Arena fails to send or receive Artnet.

Steps to Reproduce:

macOS 15.6.1 with two Ethernet adapters connected to different networks.

With both adapters enabled in macOS, Artnet input/output in Arena does not work.

Disable one adapter in macOS → Artnet immediately works again in Arena.

Tested with third-party ArtNet monitoring tools while both adapters are enabled → Artnet traffic works fine at the OS level, so the issue is specific to Arena.

Expected Behavior:
Arena should send and receive Artnet over the selected adapter, even when multiple adapters are active (just like other ArtNet tools do).

Actual Behavior:
When multiple adapters are active, Arena does not send or receive any Artnet traffic.

System Info:

Resolume Arena: 7.23.1

macOS: 15.6.1

Hardware: Mac with multiple Ethernet adapters (USB/Thunderbolt)

Do you have multiple physical interfaces, or are you doing virtual IPs?

Is Resolume allowed to access local network in the OSX privacy settings, and are firewalls off?

I'm having similar issues with macOS 15.6.1 and Arena 7.23.2 on a M2 Max MBP.

I can send Art-Net to an OLA node via Wi-Fi, but if I connect a Belkin USB Ethernet adapter and choose it as the network adapter in the DMX preferences, Arena will not send any packets over it.

Arena has local network access and I have tested both with the firewall completely off and with Arena granted specific access.

QLC+ running on the same computer is able to communicate with the OLA node in all circumstances.

Can you attach what and output in Terminal?

Also please attach the Resolume log file (zipped)
Thanks!