The Lighting Controller

That was the issue, DMX Universe Mapping was enabled. Disabled it and rebooted. PC link is blinking and I am able to communicate with my fixtures. Didn't know that was checked, must have clicked it when I first got the software, tinkering with things... Thank you for finding the fault to my issue!

Yes, That is exactly what is happening, for some reason Version 8 doesn't work at all with the D512 on my Mac 10.10.5. Yosemite

Do you think I may need to update the firmware? I just bought this unit a couple weeks ago. I can provide you the SN if need be.

The PC link doesn't blink, it doesn't even turn on. You can see in the picture I posted below/above... The unit simply won't work with version 8 on my Macbook Pro 10.5.5

I had mentioned in my previous post that I am able to use the unit with version 7 on my macbook Pro 10.5.5. and use version 8 on ...

Here is a snap shot of the interface connected with DMX turned on, DMX BarGraph, Generator playing, and the PC Link light inactive.

Yes, It states, 1 interface found Xpress512

I have the D512. It does not work with the latest release, 8.1.29. I downloaded version 7 for trouble shooting purposes. The D512 works with that version, PC link light is active, I am able to operate my fixtures... The PC link light while using version 8 is not active and does not send DMX data out ...

I have the same issue, just received my xpress512. Showxpress detects the interface when the application is launched, however, it does not have the PC link lit. There is no dmx data transmitting to my fixtures. DMX out is enabled in software. I re installed the software, rebooted and still no luck ...