how do I open a WPS file

Though the thread is old, but would like to point out that.

Now there is a WPS Reader for Mac in the Mac App Store to get, which can read/open WPS files and also can convert the WPS files to PDF.

Yeah, thanks! There are many WPS Reader on App Store. I downloaded one and works well.

NeoOffice...

http://www.fileinfo.com/extension/wps

http://www.neooffice.org/

Or maybe Open Office...

http://porting.openoffice.org/mac/download/index.html

You can convert WPS file to PDF here : http://www.conv2pdf.com