Part of the Furniture
The same test-results but on the mac minis terminal window. It says "0" under sender for some reason, and the speeds are different too for some reason when comparing them side-by-side to the macbook air. Isn't that strange? I thought they'd be identical to what the terminal on the missus' macbook air says.
Not technically a problem but it means one side was not able to communicate the stats back to the other. Implies there is a firewall or something enabled. Are you testing with firewall disabled on both machines? If you do an iperf reverse test (upload) does it fail? Typically when the stats can't be sent back the upload/reverse test also won't work as it can't initiate that TCP session.