To solve the issue of certain Mac systems prompting for an Admin password when copying files from AJA KiPro Ultras disks, you can try the following simplified steps:
1. Go to System Preferences on both the working and problematic Mac systems. Then review settings related to disk management, user accounts, and security to ensure that security settings are consistent, particularly those related to disk access and user permissions.
2. Open Disk Utility on both the working and problematic systems. Then check disk formatting, partitioning, and permissions settings to make sure that the settings are identical or appropriately configured for both systems.
3. Ensure that all macOS systems have the necessary drivers and updates to handle HFS+ disks seamlessly. If there are any updates available for the filesystem drivers or macOS itself, install them on the problematic systems.
4. Check the user account permissions on the problematic systems to ensure that the user accounts have the necessary permissions to access and modify files on external disks.
5. Although you selected the "Ignore ownership" option, manually adjust file ownership and permissions on the problematic systems to allow for copying without requiring an admin password.
6. Ensure that all macOS systems are running the latest software updates.
7. If the above steps fail, consider contacting AJA support or Apple support for help.
You can also refer to How to Turn Off Password on Mac/MacBook During Startup for further reading.