# MacOS 26.1 causes Katalon text highlighting problems in IDE **URL:** \ **Category:** Bug Report\ **Created:** [November 7, 2025, 4:48am UTC](https://forum.katalon.com/t/macos-26-1-causes-katalon-text-highlighting-problems-in-ide/185338 "2025-11-07T04:48:51Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Sixstring](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/sixstring/32/23869_2.png) [@Sixstring](https://forum.katalon.com/u/Sixstring)\ **Post date:** [November 7, 2025, 4:48am UTC](https://forum.katalon.com/t/macos-26-1-causes-katalon-text-highlighting-problems-in-ide/185338/1 "2025-11-07T04:48:51Z")
\ ***Summary** 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. ![Screenshot 2025-11-06 at 9.42.41 PM](https://europe1.discourse-cdn.com/katalon/original/3X/c/e/ce30e3c30554c4e6ae1a8d58f5822fb1941a5bf8.png) \ ***Blocker?** No, just annoying. * * * \ ***Operating System** MacOS 26.1 \ ***Katalon Studio version** 10.4.1 ---
**Author:** ![kazurayam](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/kazurayam/32/333_2.png) [@kazurayam](https://forum.katalon.com/u/kazurayam)\ **Post date:** [November 9, 2025, 10:25pm UTC](https://forum.katalon.com/t/macos-26-1-causes-katalon-text-highlighting-problems-in-ide/185338/2 "2025-11-09T22:25:01Z")
The eclipse-platform team addressed this issue. > > > After updating to macOS Tahoe 26.1, text selection in Eclipse 2025-09 (Build 4.3…7.0.20250905-1455) stopped working properly. > \- Mouse drag does not select multiple lines. > \- Shift + Arrow keys do not expand selection. > \- Works fine in other macOS apps (TextEdit, VS Code, etc.) > \- Happens even with fresh workspace and no plugins. > > Steps to reproduce: > 1. Open any Java or text file. > 2. Try to select multiple lines using the mouse or Shift + ↓. > 3. No visible selection is made. > > Expected behavior: > • Normal multi-line text selection with mouse and keyboard works as intended. > > Actual behavior: > • Selection is restricted to a single line. > • Crashes occur intermittently with Java 1.8 and the Genuitec plugin. > > > \*\*Describe the bug\*\* > On Eclipse 2025-06 M3 (4.36.0 M3), the select all (command …+ A) is not working, even cursor selection also not working on any source code (java, docker, bash etc). The OS is MacOS Tahoe 26.1 > \*\*To Reproduce\*\* > A standalone SWT snippet to reproduce the behavior (preferable) > (or) > Steps to reproduce the behavior. > Open any file on Eclipse Java IDE, try to select all code using command + A or cursor select on MacOS Tahoe 26.1 > \*\*Expected behavior\*\* > On using shortcut like command + A or Select All or Cursor selection, it should select code, currently on command + A, the cursor is going down, below is error we received on console log > > \-\[TUINSCursorUIController activate:\]: SWTCanvasView doesn't conform to NSTextInputClient protocol. > > > \*\*Environment:\*\* > 1. Select the platform(s) on which the behavior is seen: > \- - \[\] All OS > \- - \[\] Windows > \- - \[\] Linux > \- - \[√ \] macOS > > 2. Additional OS info (e.g. OS version, Linux Desktop, etc) > Tahoe 26.1 > 3. JRE/JDK version > JDK 21.0 > \*\*Version since\*\* > Eclipse or SWT version since when the behavior is seen > Version: 2025-06 M3 (4.36.0 M3) > Build id: 20250522-0641 > > \*\*Workaround (or) Additional context\*\* > No workaround as of now Sometime in future, Katalon Studio should upgrade the eclipse-platform upon which it works. @Shin ---
**Author:** ![Elly\_Tran](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/elly_tran/32/21874_2.png) [@Elly\_Tran](https://forum.katalon.com/u/Elly_Tran)\ **Post date:** [November 13, 2025, 8:49am UTC](https://forum.katalon.com/t/macos-26-1-causes-katalon-text-highlighting-problems-in-ide/185338/3 "2025-11-13T08:49:33Z")
Thank you all for your suggestion. We will put it on our backlog and plan for this. Thank you