Could not mount “EOS_DIGITAL”. (com.apple.DiskManagement.disenter error -119930872.)

The error message you're encountering, "com.apple.DiskManagement.disenter error -119930872," indicates a problem with the Disk Management system on your Mac. This error is specific to Apple's Disk Utility, which is responsible for managing storage devices, including mounting and ejecting disks.

To resolve this issue, you can try the following steps:

1. Restart your Mac: Sometimes, a simple restart can fix temporary glitches in the system. Make sure to safely eject the SD card before restarting.

2. Try a different USB port or card reader: If you're using an external card reader, connect it to a different USB port on your Mac. If possible, try using a different card reader to rule out any hardware issues.

3. Check the SD card on another device: Insert the SD card into another camera, computer, or card reader to verify if the issue lies with the card itself. If it mounts without any problems on another device, the issue may be related to your Mac.

4. Reset the SMC (System Management Controller): The SMC manages various hardware functions, including the USB ports.

5. Repair disk permissions: Launch Disk Utility by going to Applications > Utilities > Disk Utility. Select your Mac's internal hard drive from the sidebar, then click on "First Aid" and choose "Repair Disk Permissions."

6. Update macOS: Keeping your operating system up to date ensures you have the latest bug fixes and improvements.

If none of these steps resolve the issue, you may need to consider more advanced troubleshooting or consult Apple Support for further assistance.

Someone in the Apple Developer Forums who came across a similar issue suggested logging out the current user, then logging back in.

error mounting external drive Big … | Apple Developer Forums

There was similar advice in Apple Community Discussions threads, for instance:

Actual Fix for "Unable to Mount - com.app… - Apple Community

gsball3 Said:

"Could not mount “EOS_DIGITAL”. (com.apple.DiskManagement.disenter error -119930872.): What can I do to run and mount this SD card? SD card is a 32 GB onn. card"

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Verify if you can Mount this:

Are you unable to mount it in Disk Utility?

Logging out and back in worked for me, but I also found another solution that works. I couldn't use the log out/in approach for an action cam I have that only goes into disk mode when attached to a computer. Logging out, caused the cam to leave disk mode. So I went looking another solution. Found this on StackOverflow. Basically mounting manually via terminal.