Connecting multiple usb microphones.

gDay guys,

have a 2013 macbook pro, have started recording some stuff with 2 usb mics no issues, have now introduced a 3rd and with only 2 usb ports i thought i would buy a powered usb hub.

Now i can't get them to work, the mac picks all 3 mics up but when i go into garage band none of the mics register any voice. I have created an aggregate device with all 3 mics and followed a lot of youtube videos but wondering if anyone out there has had the same issue or knows a solution.

I have also tried just a plan usb hub (unpowered) no luck so thought the powered one would easily do.

All 3 mics are the same brand. Used 2 without any issues sounded great etc.

Anyway thanks for any help i may get.

Cheers