If you are running an installer for one of our Alfa USB WiFi products on any version of Mac OS, you will be prompted for the Administrator account password. If you have owned your Mac since it was knew, you would have created this password yourself. But if you forgot the password or bought the Mac secondhand and don't know what it is, you will not be able to proceed with driver installation. Therefore your must recover the password.Here is an excellent article showing three ways to do this. We do not have permission to reprint the text of the article so are linking to it:http://osxdaily.com/2010/08/10/forgot-mac-password-how-to-reset-mac-password/