After updating Katalon and MacOS to latest versions, when trying to highlight a block of text in Katalon Studio script editor, the highlighted text only shows the final line you selected with a shift click or a click drag.
*Steps to reproduce
Upgrade Katalon Studio to latest (10.4.1)
Upgrade to MacOS 26.1 (latest)
Run Katalon Studio and open any script (Test case or Keyword for example)
Try to highlight several lines of text to copy.
*Expected Results
The text should all display highlighted, so I can visually see what text I’m copying.
*Actual Results
The text does not all show highlighted, just the last line.
If you actually copy (cmd + c) the text then it really is copied fine, just hard to tell what you’re copying.
*Screenshots / Videos
The lines from “public static TestObject” through to the highlighted line are all actually highlighted. But only the final line shows.