My Angular Clock board isn't showing up under serial ports using the Arduino software or using terminal to search the ports. I'm on a macbook pro running El Capitan. I can, however, see it if I look at System Preferences>Network it shows up as an unconnected Arduino Leonardo.
I've read that this might be an issue with El Capitan, but it wouldn't show up on my Windows 7 computer at work either. I haven't tried as many different solutions on there as I have on my MBP though, just plugged it in and noticed it didn't show up. My other Arduinos however, do show up when I plug them into it.
I just want to get my meters calibrated before Christmas as it's a present 