Has anybody found a solution to the problem of Macs OSX El Capitan not assigning Arduino boards with a COM Port yet? Any advice will be GREATLY appreciated. Thanks.
El Capitan works fine on my Arduino UNO. Could you possibly have a clone with an FTDI, Prolific PL2303, or CH34x chip? If so you will need the appropriate driver. I think the CH34x driver has problem with code signing.