IZArc for Mac

Is there anyone out there with any experience with a file compression/decompression software known as IZArc? This application was primarily developed for Windows but I was hoping there was a mac application. My problem at the moment is that I'm having extreme difficultly opening a zip file that transforms to something that displays the puzzling suffix "cpgz". It was suggested that I open this with IZArc but I can't find any versions for mac. My current tools are iArchiver and 7zip along with the mac house brand but no luck in opening this file so far. Any help would be greatly appreciated.