Unity 6 2 Beta OnMouseDown Not Working Solved

Unity 6.2 Beta – OnMouseDown Not Working: Quick Fix

• Problem: OnMouseDown() event not triggering on 3D objects like Sphere in Unity 6.2 beta.

• Cause: Unity 6.2 uses the New Input System by default, which doesn't support legacy OnMouseDown() events.

• Expected Setup:

  • Script with OnMouseDown() attached to GameObject (e.g., Sphere).

  • GameObject has collider component.

  • Script logs "Click" to console.

• But: Event never fires due to input system incompatibility.

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✅ Solution

1. Go to Edit > Project Settings > Player.

2. Under Other Settings, find Active Input Handling.

3. Change from Input System Package (New) → Both.

4. Apply changes and restart Unity when prompted.

5. Re-test the click in Play Mode → ✅ OnMouseDown() works now!

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💡 Notes

• Use "Both" option to support legacy and new input systems.

• Useful when migrating older Unity projects to 6.2 beta or later.