New MacBook Pro with Sonoma OS not recognizing WD Passport portable drive with High Sierra OD

Hi rotcrna,

Thanks for reaching out and posting in Apple Support Communities, we'll be happy to see how we can help.

You didn't mention what steps you have tried, so if any repeat steps, go ahead and skip them. We found the following article: If a USB device doesn’t work with Mac - Apple Support. It has suggestions you can try when this behavior happens. We'll list the first two below to help get you started giving these a try.

If a USB device isn’t working properly, make sure it’s connected to your computer correctly, is plugged into a power outlet if it has a power cord, and has any necessary software installed.

• Check the power, port, and cable connections: Make sure the USB device is turned on and its cables are properly connected. If your computer has more than one USB port , switch the device’s cable to another port. If you still can’t use the device, contact the manufacturer for more information.

If you can use the device after switching ports, connect another device to the first port. If you can’t use this device, shut down the computer and unplug it from the power outlet. Wait about a minute, then plug it back into the power outlet and start up your computer.

If you still can’t use a device with the port, your computer may need to be serviced. See Find out how to service or repair your Mac.

• Check for device firmware or software updates: Make sure you installed the latest software and firmware for your device. Visit the manufacturer’s website for any updates.

Reach back out if you have any questions.

Take care!