If you are searching for a simple tool that can convert JUnit XML reports into HTML, then junit2html might be the right and simple solution. It can be installed on macOS with the following commands:

brew tap kitproj/junit2html --custom-remote https://github.com/kitproj/junit2html
brew install junit2html

Then it can be used as shown below to convert an XML report to an HTML report:

junit2html < report.xml > report.html
open report.html