I just just got a new MacBook Pro 15", and was finishing the installation of all my software. I installed FaxSTF (Smith Micro Fax) which was the last software to install.
I rebooted and looked in the Finder and could not find Fax Pro. I then reinstalled it and at the end it just crashed. After sending an email off to the software vendor for support, I tried to plug in the Apple Fax adapter and to my surprise received this message: 'This computer will not allow Fax.'
[crarko adds: Can anyone confirm or deny this? I wouldn't be surprised if it's true. What does the 'Print & Fax' System Preference show on these models?]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20110624082306794