We've tested image previewer with QQLnF under MacOSX and it seems to work fine. See link below:
http://www.jfileupload.com/products/dem ... qqlnf.html
(Demo link is release 2.9)
You have a screenshot below to under MacOSX 10.6 with Safari 5. JNI error is minor, it prevents from displaying some icons, we've implemented a workaround to have native libraries under java.library.path automatically.