In 2007 I purchased an Apple USB Modem to assist me when traveling, plus have used at home for my MacBook. Unable to have the modem connect. In September I updated my Laptop to Lion and have not used the Modem. Is the upgrade possibly the reason?
The installation of Lion did your USB modem in. If you need it, reinstall Snow Leopard'
https://support.apple.com/en-ap/HT201833
Ciao.
An explanation:
http://www.sustworks.com/pa_guide/compatibleModems.html
Apple USB Modem
[16-Jun-2011 - The Apple USB Modem is no longer supported on newer Macs running Mac OS X Lion because the modem driver is a 32-bit kernel extension and Lion boots with a 64-bit kernel by default. MacBooks and older 32-bit CPUs (prior to the Core 2 Duo) still run a 32-bit kernel.]
This is a controllerless or software modem based on the Motorola SM56 design. The advantages of a software modem are low cost, low power consumption, and compact design. The disadvantage is that modem processing is offloaded to a specialized driver that runs on the host computer. In this case, Apple has customized Motorola's driver to produce a generally solid product. At the time of this writing, Apple has discontinued the Apple USB Modem (MA034Z/A) but they are still available from Amazon for around US$50.
Apple USB Modem will not connect. September updated Laptop to Lion. Does not appear modem is supported.
