Hidden DMG support files appear in the macOS installer window

[syamsalik]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request or bug report that matches this issue, without success.

Describe the bug

When the draw.io 30.3.6 Universal DMG is opened on macOS, internal DMG support files appear inside the main installer window.

The following files are visible above the draw.io application icon:

• .background.tiff
• .VolumeIcon.icns

These files appear dimmed because they are hidden files, but they still occupy visible positions inside the installer layout when Finder is configured to display hidden files.

To Reproduce

Steps to reproduce the behavior:

1. Download the macOS Universal DMG for draw.io 30.3.6.
2. Open the downloaded DMG.
3. View the draw.io installation window.
4. Observe that .background.tiff and .VolumeIcon.icns appear above the draw.io application and Applications folder.

Expected behavior

The installer window should display only the items required for installation:

• draw.io.app
• The drag-and-drop arrow
• The Applications folder

Internal DMG resources such as .background.tiff and .VolumeIcon.icns should not occupy visible positions in the installer window, even when hidden files are displayed in Finder.

Screenshots

The attached screenshot shows .background.tiff and .VolumeIcon.icns appearing in the mounted DMG window above the application installation area.

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version 30.3.6-universal

Desktop (please complete the following information):

• OS: macOS
• Package: macOS Universal DMG

Additional context

The application can still be dragged into the Applications folder and installed normally. This appears to be a DMG packaging or Finder layout issue rather than an application functionality issue.

[draw-io-triage-bot]

👋 Thank you for opening this issue!

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Summary: When opening the draw.io macOS Universal DMG with Finder's 'show hidden files' setting enabled, internal DMG support files (.background.tiff and .VolumeIcon.icns) are visible and positioned within the installer window layout. The user requests these files be repositioned outside the visible area so they don't clutter the installer view even when hidden files are displayed.

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📝 Additional Information Needed

To help us investigate this more effectively, could you please provide:

• Can you confirm whether you have Finder configured to show hidden files (e.g., via defaults write com.apple.finder AppleShowAllFiles YES or Cmd+Shift+.)? The .background.tiff and .VolumeIcon.icns files are standard hidden DMG resources that are normally invisible unless the user has explicitly enabled hidden file visibility in Finder.
• Is your concern that these files should be repositioned outside the visible window area (so they don't appear even when hidden files are shown), or is the concern that they shouldn't be hidden files at all?

📋 Bug Report Template

**Environment:**
- draw.io version: [e.g., web app / desktop 24.x.x / Confluence plugin]
- Browser (if web): [e.g., Chrome 120, Firefox 121]
- OS: [e.g., Windows 11, macOS 14, Ubuntu 22.04]

**Steps to Reproduce:**
1. Go to ...
2. Click on ...
3. See error

**Expected Behavior:**
What you expected to happen.

**Actual Behavior:**
What actually happened.

**Screenshots/Files:**
If applicable, add screenshots or attach the .drawio file.

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_{🤖 This is an automated response to help with initial triage. A human maintainer will review this issue. If you've provided all the requested information, no further action is needed - we'll get back to you soon!}