MOSO has released version 1.6.0 of the Xmplify XML Editor (http://xmplifyapp.com) for Mac OS X. It’s a XML editor built specifically for Mac OS X 10.6 and higher.
Xmplify XML Editor provides a fully XML-aware editing environment with DTD and XML Schema-based auto-completion, automatic document validation, XSLT and XPath support, live HTML preview and much more. Version 1.6.0 adds support for extracting and displaying element specification details from XSDs and DTDs, plus fixes and other improvements.
Xmplify costs US$59; volume and educational discounts are available. Version 1.6.0 is a free upgrade for Xmplify 1.x users.