JetBrains Support Ticket — PyCharm mouse not working on macOS 26.5

Summary

On macOS 26.5 (Tahoe), PyCharm 2026.1.2 (build PY-261.24374.152) and other JetBrains IDEs load normally, but mouse clicks inside the window content area do not work. Window chrome (red/yellow/green buttons, title bar) often still responds. Keyboard shortcuts work in many cases.

The same behavior affects all Java desktop UIs on this machine: a minimal standalone Java Swing test application also cannot receive mouse clicks. Native apps (e.g. VS Code, Cursor, Safari) work fine with the mouse.

This appears to be a macOS 26 + Java AWT/Swing input/event compatibility issue, not a project-specific or plugin-specific problem.

Environment

Item

Value

Product

PyCharm 2026.1.2 (Professional)

Build

PY-261.24374.152

Bundled JBR

25.0.2+10-b329.117-jcef (JBR-25.0.2)

OS

macOS 26.5 (25F71)

Kernel

Darwin 25.5.0

Hardware

Mac mini, Apple M4, 16 GB RAM

Timezone

Asia/Shanghai

Install path

/Applications/PyCharm.app

Also reproduced with WebStorm (reinstalled). Issue is not limited to a single IDE edition.

Expected behavior

Mouse clicks should focus the editor, interact with tool windows, dialogs, and all Swing/Compose UI components.

Actual behavior

• Mouse clicks on editor, tool windows, dialogs, and most in-window UI are ignored.
• Title bar / window controls sometimes still accept clicks.
• Keyboard navigation and shortcuts often still work.
• Standalone Java Swing test window: same mouse failure (rules out IDE-only configuration).

Steps to reproduce

1. Install macOS 26.5 on Apple Silicon Mac.
2. Install PyCharm 2026.1.2 from JetBrains (or reinstall after full cache/config wipe).
3. Launch PyCharm, open any project or welcome screen.
4. Try to click in the editor or any in-window button with trackpad or mouse.
5. Observe: no response to mouse clicks in content area.

Optional step 6: Run any minimal Java Swing JFrame with a JButton — mouse clicks also fail.

What we have already tried (no lasting fix)

• Full uninstall/reinstall of PyCharm and WebStorm (including ~/Library/Application Support/JetBrains, Caches, Logs).
• Custom VM options in pycharm64.vmoptions:
  • -Dsun.java2d.metal=false
  • -Dcompose.swing.render.on.graphics=false
  • -Didea.hardware.accelerated=false
  • UI scale overrides
• Confirmed in idea.log that JVM starts with metal=false and compose.swing.render.on.graphics=false (launcher defaults also set these).
• Disabled Stage Manager (GloballyEnabled = 0).
• Dock auto-hide, single monitor, quit overlapping apps (Cursor, etc.).
• Safe mode / new project / without third-party plugins.
• Disabling jetbrainsd daemon.
• Tested WebStorm 2025.3.x after reinstall — issue persists on macOS 26.5.
• Changing system JDK (jenv OpenJDK 17 / Oracle 23) — no effect (IDE uses bundled JBR).

Possibly related software on the host (for your investigation)

These run on the machine but isolation tests may not have been fully completed:

• CorpLink (enterprise endpoint, system extension)
• Mos (mouse utility)
• Sogou Input Method
• openclaw-gateway (LaunchAgent)

Native Electron apps are unaffected; only Java/Swing UIs show the problem.

Logs / diagnostics

• Attached: ZIP from Help → Collect Logs and Diagnostic Data (please attach when submitting).
• idea.log shows JVM options include -Dsun.java2d.metal=false and -Dcompose.swing.render.on.graphics=false at startup.
• Earlier sessions on macOS 26.x sometimes showed accessibility-related delays (CAccessibility / accessibilityHitTest / InvocationEvent timed out) in community reports; please check thread dumps if present in the bundle.

Related community report

Similar report (editor mouse on macOS 26.3, M1):
https://intellij-support.jetbrains.com/hc/en-us/community/posts/33345672257042-PyCharm-editor-does-not-respond-to-mouse-clicks-on-macOS-26-3-M1

Questions for JetBrains

1. Is this a known compatibility issue with macOS 26.x (Tahoe) and JBR 25 / IntelliJ Platform Swing or Compose rendering?
2. Are there recommended JVM flags, JBR builds, or IDE versions that restore mouse event delivery on macOS 26.5?
3. Should we file a YouTrack issue for the Platform (IDEA) rather than PyCharm-only?
4. Any workaround involving NSApplicationUpdateCycleEnabled / NSEventConcurrentProcessingEnabled for com.jetbrains.pycharm?

Impact

Cannot use PyCharm/WebStorm/IDEA for daily development on this workstation without relying entirely on keyboard — severely blocks productivity.

Thank you for investigating.

Form field hints (if the web form asks)

• Product: PyCharm
• OS: macOS
• Build: 261.24374.152
• Priority: High (or as appropriate)
• Type: Bug / Technical issue