Question: Mac messages - cannot send sms
I used to be able to use my mac to send sms and imessages, but now it seams I am only able to send imessages.
When I send via sms (e.g., to a non-iphone), i get a red exclamation mark and "Not delivered".
Am I doing something wrong?
MacBook, Mac OS X (10.7.4), Upgraded to 4gb memory and 250 HD