OK, I just checked and the VI Tester package claims that it only works on Windows. I'm not sure why that's the case, or if it's true -- my thought is that this should work just fine on Mac and Linux. I've repackaged VI Tester such that it should install on Mac.
Can you try this package (link below)? jki_labs_tool_vi_tester-126.96.36.1995-2.ogp
Please let me know how this works for you.