Mac Authenticode cannot be displayed or cannot receive a workaround:
Then Mac click on the information---preferences---imessages you accept the information address if your phone number and the iphone set the same attention to the iphone side to set the default with the mobile phone number and then log off again:
The key is to check your phone imessage send and receive address has its own mobile phone number!!! Generally is the e-mail address, not receive the verification code of the students are here do not have their own mobile phone number, the solution is to turn off the IMESSGE switch on the phone and then open, add the phone number to the send and receive address, and then the phone will receive a confirmation message from the operator, restart your Mac, will display the same confirmation message, Then click on the text message forwarding you can receive the verification code.