Cord Canon Rebel

Cord Canon Rebel
how come my Canon Rebel XSI won’t connect with the computer through USB?

I plugged the cord into the camera, and computer, then turned the camera on. It said “busy” and the red light on the bottom right was blinking, then turned off about 8 seconds later, and the camera turned off. Its fully charged. Anyone know what to do? Please help. Thank you.
And I have a Macbook.

Unfortunately, in the case of Canon cameras, you have to install the software that came with your camera in order to copy the images on your memory card if it is still in the camera.

If you wish to use the card reader on your computer or buy a USB 2.0 card reader for around $8, you do not have to load the Canon programs on you computer.

Persian kitten playing with window cords