It is Ok. It means, this smaller dmg file could be downloaded, your Mac OS does not show "damage" error for it.
You got "damage" error for the Archicad Installers' dmg files.
Hm.
Quite strange.
We found information about "damage dmg" errors:
Please, check these, maybe one of them help you:
When you see an error like "damage during mount" on macOS (often worded as "The disk image is damaged and can't be opened" or something similar), it generally refers to an issue encountered while mounting a disk image (DMG) file. This can happen for several reasons:
🔧 Common Reasons for "Damage During Mount" Errors on macOS
1. Corrupted DMG File
- The DMG file you're trying to open might be incomplete or corrupted, especially if downloaded from the internet.
- ✅ Solution: Re-download the file from a reliable source.
2. Gatekeeper Blocking the App
- macOS Gatekeeper may block apps or disk images that aren't signed with a trusted Apple Developer ID.
- ✅ Solution: Try bypassing Gatekeeper (Right-click → Open, or use
sudo xattr -rd com.apple.quarantine <path>).
3. Quarantine Attribute
- Files downloaded from the internet are tagged with a "quarantine" attribute that may prevent them from opening.
- ✅ Solution: Remove the quarantine attribute with Terminal:
4. Filesystem or Permission Errors
- Your drive might have file system issues or permission problems.
- ✅ Solution: Run Disk Utility and use First Aid to check and repair your disk.
5. Incompatibility or OS Version Issues
- The DMG may have been created with a newer version of macOS or in a way that's incompatible with your system.
- ✅ Solution: Check if your macOS version supports the image. Try opening on a different system.
6. Security & Privacy Settings
- If apps from unidentified developers are blocked, this might affect DMG files.
- ✅ Solution: Go to System Settings > Privacy & Security > Security, and check if there's an "Allow anyway" button.
7. Bad Sectors or Hardware Issues
- If your disk has bad sectors, files can be damaged even after successful downloads.
- ✅ Solution: Backup your data and run hardware diagnostics (Apple Diagnostics or Disk Utility).
🧪 To Diagnose Further:
You can try mounting the DMG via Terminal for more detailed error messages:
bashCopyEdithdiutil attach /path/to/file.dmg
This might give you a clearer explanation than the Finder dialog.
bashCopyEditxattr -rd com.apple.quarantine /path/to/file.dmg
Laszlo Nagy
