Pathology 4+

Celestial Teapot Software

    • 3.5 • 4 Ratings
    • $4.99



Pathology is a thoroughly Mac-native XPath debugger and visualizer written entirely in Cocoa. Pathology includes the innovative ability to debug your XPath queries by proceeding through them step-by-step.

Pathology includes:

* A full-featured XPath text editor with syntax highlighting, and code auto-completion.
* Several syntax highlighting themes to choose from (in Preferences).
* Check 'Debug' to slowly proceed through the XPath expression step-by-step, seeing the filtered result nodes each step of the way.
* An interactive console with click-able error messages that lead you right to the syntax or runtime errors in your XPath or source XML.
* Each Pathology window is a ".pathology" document that can be edited, saved and re-opened later.
* A query results table contains details on the selected nodes or items. Clicking on a row focuses the corresponding node in the source XML text.
* Query result nodes are also highlighted conspicuously in the source XML text.
* Pathology's XPath engine is powered by Panthro, an open-source implementation of XPath written in Objective-C that includes the ability to debug the evaluation of an XPath expression step-by-step.

As a Mac developer learning XPath, Pathology is the single-window, graphical XPath visualizer with Mac-native text editing, code completion and tab triggers that I've always wished I had.

What’s New

Version 1.9

– Improved Stability.

Ratings and Reviews

3.5 out of 5
4 Ratings

4 Ratings

djeikyb ,

Opens xml files!


1. Can open xml files
2. Stepping through your xpath expression is pretty neat
3. Comes with nice syntax highlighting (multiple themes, customizable)
4. Supports custom namespace prefixing
5. The interactive console is nifty
6. Has a free trial (albeit with limited features)


1. The xml pane doesn't autoscroll to the first match when you run
2. Can't edit your xml file (you can save your workspace, but not the xml file)
3. Doesn't auto-update xml file if edited in a different program


The feature list mentions auto-complete, but it isn't immediately clear to me what is auto-completable, nor how to trigger it. I tried ctrl-spacing around the xml and xpath windows and didn't get anywhere.

NeilD3 ,


This app has no instructions, and no help. It fails to process large XML files, giving no error messages, just a blank screen. Opening a small XML file received from a third party results in an error message that the app is unable to open the file. The concept is good, but so far I have not been able to view any XML in it.

iPadAndiPhoneReviewerPersonage ,

Exactly what i needed

I use Xpath to write override files for giant xml documents. On first use it already showed me that I was doing things I didn't want to be doing!

Awesome product.

App Privacy

The developer, Celestial Teapot Software, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.