v1.5.6 macOS

[sstaub]

It is not possible to open the app on macOS (Sequoia 15.7.4). I get a system warning from macOS that the app can't open because it is damaged. v1.5.5 works.

[Tepperse]

Experiencing the same issue here. Running Tahoe 26.3.1

[fiverecords]

Could you try a quick test to see if this is a Gatekeeper quarantine issue?
I suspect macOS is flagging the app as "damaged" because the new version uses the SystemConfiguration framework to manage IPs and VLANs. Since it's currently ad-hoc signed (and not notarized by Apple), macOS might be extra aggressive with its security checks.
Try running this in your Terminal to strip the quarantine flag and let me know if it opens:

sudo xattr -rd com.apple.quarantine /Applications/DMXRouter.app

(Note: Change the path if the app isn't in your Applications folder).
If this works, it confirms I need to set up a full Apple Developer ID and Notarization for the next build to avoid this. Thanks for testing!

[sstaub]

The app doesn't open now without any message. Sorry.

[fiverecords]

Try to resign:

sudo codesign --force --deep --sign - /Applications/DMXRouter.app

[sstaub]

OK, this works.