My problem has been solved,software was not the last, although I sometimes got all arduino cc for mac osx.The Mac recognized this as an internet network and not as a com port. I indicate that and the error has disappeared and the software recognize my arduino. unwelded
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16