I was using this modem on my MAC for quite a long time without any issue. But now, after upgrading to OS X Yosemite 10.10.2, there is no operation at all. All the time when the modem application is started, it says "No Device" but the dongle is connected to MAC on the regular USB port I generally use.
I tried to re-install the app many times in different procedures but didn't help. The same dongle/modem as it is works fine with Windows PC. Can anyone shed some light on this issue?