Mention of USBView is found when you see how to store the ECID of your iPhone. Note that USBView is an application for the Windows and not for the MAC computer.
You can download the USBView free at http://www.ftdichip.com/Support/Utilities/usbview.zip. Unzip the file and run the .exe file. It does not install anything. The EXE file runs just as it is. Here is how it looks like when you run the program.
If you have any more question about USBView, feel free to post your comment below.