From a few minute's test it seems to work as advertised. However, I find the interface clumsy compared to DropZip (part of StuffIt). DropZip will create an archive with no user interaction (using your favorite default settings) and then quit -- very unobtrusive! And you can hold down the option key to get the options panel if you want to do something unusual. Very elegant! Whereas YemuZip always prompts for a name and always keeps running when finished.

Also, it apparently is adware -- at least there is a preference to hide ads that requires buying the "pro" version -- for a paltry $5, but good luck finding that out without starting the registration process, and good luck finding out the "pro" version offers anything other than hiding ads because there is NO information at all about it at the developer's web site.

I'll stick to DropZip but I keep hoping somebody will come out with a cheap alternative that works just as well because it's the only component of StuffIt I still use. And I only use it to create unix/windows-compatible ZIP archives (Apple's own archiver works fine for zipping files that contain Mac-specific info).