You could have downloaded logKext 2.4 for Mac from our application library for free. This free Mac app is an intellectual property of SlEePlEs5. The application relates to Security Tools.
From the developer:
LogKext is an open source keylogger for Mac OS X, a product of FSB software. LogKextClient is an interactive client that allows you to change preference values that will change the behavior of your keylogger. Control and usage of logKext is through logKextClient. LogKextClient runs through the Mac OS X Terminal.
You may want to check out more Mac applications, such as Key Holder or PasswordVault Lite, which might be related to logKext.