claude-code - 💡(How to fix) Fix [BUG] Claude for Mac UI broken in windowed mode (works in fullscreen) [1 participants]

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anthropics/claude-code#48800Fetched 2026-04-16 06:50:37
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Error Message

Error Messages/Logs

No error messages. This is a UI rendering issue.

Code Example

No error messages. This is a UI rendering issue.
RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Claude for Mac has a UI rendering issue.

In windowed mode:

  • text is clipped
  • layout is misaligned
  • parts of the UI appear broken or blank

In fullscreen mode:

  • the issue disappears completely

The problem returns even after reinstalling the app.

Steps already tried:

  • reinstalled the app
  • restarted multiple times
  • disabled GPU/hardware acceleration

Result:

  • issue persists in windowed mode only

This looks like a rendering/scaling bug in Claude for Mac.

Issue occurs on the latest version (1.2581.0)

<img width="1792" height="1120" alt="Image" src="https://github.com/user-attachments/assets/45641b28-90a8-4f80-8d1a-cc9f8fb49b7f" /> <img width="1792" height="1120" alt="Image" src="https://github.com/user-attachments/assets/1db6736d-31a8-4dfb-a9cc-f7d91a8e8ff0" />

What Should Happen?

The Claude interface should render correctly in both windowed and fullscreen modes without clipping, layout issues, or broken UI elements.

Error Messages/Logs

No error messages. This is a UI rendering issue.

Steps to Reproduce

  1. Open Claude Desktop app on macOS
  2. Use the app in normal window mode (not fullscreen)
  3. Observe UI rendering issues (cut text, black areas, broken layout)
  4. Switch to fullscreen mode
  5. Issue disappears in fullscreen

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

unknown

Claude Code Version

1.2581.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="1792" height="1120" alt="Image" src="https://github.com/user-attachments/assets/5f212543-32ec-422a-b84f-c6ca6a6dedc2" /> <img width="1792" height="1120" alt="Image" src="https://github.com/user-attachments/assets/3699f1fa-ac95-4e4d-81c7-e83eef0d2328" />

extent analysis

TL;DR

The issue is likely related to a rendering or scaling bug in the Claude for Mac application, specifically in windowed mode, and may require a code fix or configuration adjustment to resolve.

Guidance

  • Verify that the issue persists across different macOS versions and hardware configurations to determine if it's a platform-specific problem.
  • Investigate the application's rendering engine and scaling settings to identify potential causes of the clipping and layout issues.
  • Consider comparing the rendering code between windowed and fullscreen modes to identify any differences that might be contributing to the issue.
  • Review the application's update history to see if any recent changes might have introduced the bug, given that it's reported as a regression.

Example

No specific code example can be provided without more information about the application's codebase, but investigating the rendering engine and scaling settings would be a good starting point.

Notes

The issue seems to be specific to the windowed mode and disappears in fullscreen, which might indicate a problem with how the application handles window resizing or scaling. The fact that it's a regression suggests that a recent update might have introduced the bug.

Recommendation

Apply a workaround by using the application in fullscreen mode until a fix is available, as the issue disappears in this mode. This is recommended because it allows users to continue using the application with minimal disruption while the development team investigates and addresses the root cause.

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claude-code - 💡(How to fix) Fix [BUG] Claude for Mac UI broken in windowed mode (works in fullscreen) [1 participants]