Even though I think you're out of luck wrt Win32::Word::Writer, it's nice to see someone showing an interest in the module :)

Yes you would need Word installed, but since Win32::OLE is very much Windows specific, it won't work in OS X.

If you tell us what you want to do on a higher level we may be able to help you to an alternative, like creating an RTF file, that Word can open.

/J