Unable to connect miners OS X 10.9

bitinvestment

I am new to mining. I have an iMac running the latest version of OS X 10.9. I have a total of Three Butterfly Labs 60 Gh/s miners. I am not sure where I am going wrong. I am able to connect one miner through BFG miner using the terminal. I know the address to all Three miners. When I try to connect more than one.

I get these results 

- I see sick on the one of the miners

- They start to slow down

- sometimes they turn off 

 

I am not sure if I am typing in something wrong or my power supply setup is wrong. Looking for any help I can get. 

Thanks 

FabulousPanda

What settings are you using? Usually this means one of the devices is struggling. Try to remove any excess dust. It might be worth running them on individual processes so that one doesn't disturb the others.

FabulousPanda

Also what is your PSU setup?