XML Editor for Mac OSX

Oxygen is the best XML editor available for Mac, targeting a large number of users ranging from beginners to XML experts. It is the only XML tool that supports all of the XML schema languages. The XSLT and XQuery support is enhanced with powerful debuggers and performance profilers. You can use Oxygen XML Editor to work with all XML-based technologies, including XML databases, XProc pipelines, and web services.

XML Schema Designer integration with XML editor - Visual Studio (Windows)

XML Copy Editor

CotEditor -Text Editor for macOS

Demo: Using Namespaces With W3C XML Schemas

Xmplify - Mac XML Editor - Simple powerful editor with great customer service : r/mac

Professional Open Source XML Editor 2023 - EditiX

Xmplify XML Editor for macOS

Download EditiX XML Editor (for Mac OS X) 2012 for Mac Free

XML Editor for Mac, Windows, and Linux

XML Preferences for macOS Custom Settings Profile

Try Top 10 Free HTML Editor for macOS 10.14