iMac 27inch mid 2011
MacOs High Sierra 10.13.6
Pluggable Driver Version 3.0
Coolterm Version 1.5.0
Two Pluggable USB to Serial cables
Two Coolterm windows each connected to one of the USB to Serial Cables
Both ports communicate fine.
Disconnect one port everything is fine.
Disconnect second port coolterm hangs (process waiting on i/o)
In a simple C program the just reads from the serial ports.
One connection closes fine.
Second connection hangs. Waiting on I/O can’t kill process (aka kill -9 pid //doesn’t work)
Can you tell me how to fix this?