This CocoaGUIDGen is made for generating GUID or UUID with the format required for MS COM programming or CFPlugIn for MacOS X. It mimics the GUIDGen add-in for the Visual C++. Wouldn't it be convenient if it generates the number in the way it is usually used? Where the GUID is used is for MS COM or CFPlugIn for Mac OS X. ( Whether you believe it or, MacOS X uses MS COM in very simple format. )
If you are a UNIX guy, you can just use the uuidgen avaiable as a command line interface, i.e. CLI, program.
You can obtain its source using a subversion client or download zipped source file.
How to get the source codes and binary files
Please visit its Sourceforge project page