Photos Won't Recognize Camera OS Sierra

I just got Sierra and my new Mac won't recognize my Canon EOS Digital Rebel XT either. Doesn't look like there's any drivers or anything pertinent on Canon's site. IC doesn't see it either. Didn't have a problem with Yosemite or El Capitan -- it was pretty much plug & play. And I can't erase the card, I just did a photo shoot and need the images to work. SD card is too big to put in slot. All images are JPEG. Firmware on camera is up-to-date too.

Will Image Capture see it? Use IC or the finder to move the photos to your Mac and import into Photos - once they are safely on the Mac and backed up use the camera's format command to erase and reformat the card - this should resolve this - and for the future it is a best practice no to have PHotos (or any computer program) erase the photos but to keep them until you are sure they are safe and at least one backup has occurred then erase and reformat the card using the camera - this protects you against loss of photos and keeps the card format fresh and uncorrupted

LN

Did you use the camera's format command to erase the photos? If you did hen you need to connect the camera and look through the menus and try each connection setting or read about them in the camera manual - it may be an issue the the connection type you are using

LN

Did you connect the camera directly or use a card reader? If a camera is directly connected it needs to be in the correct mode for a computer connection. Check the settings in the camera. Which camera model are you using?

It is usually safer to use a card reader instead of connection the camera directly. This way you avoid problems with the camera mode and the camera software interfering.

Are you shooting RAW or JPEG? If RAW, is the camera on the list of supported cameras for Sierra?

See: Digital camera RAW formats supported by iOS 10 and macOS Sierra - Apple Support