This tutorial will show you how to install iText on Mac OS X. Java is pre-installed on Mac OS X. If you should not have the latest version then you can update via the “Software Update” function of the OS. The procedure for installing external libraries, such as iText, on the Mac is quite simple: locate the folder /library/Java/Externals and drag’n'drop the .jar file into this folder.
Type your administrator password when prompted, and you are ready to go. If you are using another java editor and this procedure doesn’t work, make sure that your classpath is pointing to this folder.