I'll preface this
1. I'm stuck in the newbie section. Yea.
2. I don't have this problem on other machines but I'm solving for this particular machine because it is already on 24/7

I take a couple of USB Eruptors, stick them on a windows machine or a Mac, cgminer shows ~330Mh/s each. BTCGuild shows the cumulative correctly. I put them in the back of a Mac Mini, cgminer still reports ~330Mh/s per stick but BTCGuild is only showing ~370Mh/s in aggregate.

I'm assuming a USB undervoltage would show on cgminer as a reduced Mh/s within cgminer.

Aside from that, it's cgminer 3.3.2 on both the Macs I have tried. No GPU mining. Difficulty of 1. Nothing fancy in the configuration. Sticks are not on hubs, all direct to MB. No network differences. Happens right out of the gate before they get hot. No noticable difference in rejection or HW fail rate. Why would the 330Mh/s per stick not be reaching the pool?

Thanks in advance.