There are no drivers to install on the Mac for your 60D. I normally don't use the USB method to connect the camera (I remove the memory card from the card and insert it into the computer to transfer images.) But a couple of things to keep in mind:
1) Try connecting the camera DIRECTLY to the computer via the USB cable (in other words, if you were using a USB "hub", don't use the hub. I currently have a hub I trust -- but only after going through two or three hubs in which some devices failed to work if the a hub was involved. I've just seen too many falkey hubs to trust them.
2) The camera only uses the "data" pins of the USB cable. It does not use the power pins. But these days so many devices charge via a USB cable that there are now a lot of "USB" cables out there that are really just power-only cables to charge devices (they don't even wire the data pins -- just power). You need to make sure the cable you use is a proper cable (such as the cable that came with the camera.)
Connect the camera, power it on, and launch the "System Information" app on your Mac (It is in the "Applications" -> "Utilities" folder). In the left margin of the "System Information" window, highlight "USB" (it's probably the last entry of the "Hardware" section). Scan the panels on upper right looking for "Canon" to see if the computer sees the camera.
Launch an app that should be able to connect to the camera... such as "EOS Utility". Apple's photo apps would also work. It should see your camera and be able to transfer images. Note that a camera utility will not necessarily launch on it's own. It's possible to configure the Mac to tell it which app to launch when it sees a camera connect (on your version of Mac OS X it would probably default to iPhoto unless it's been changed.)
Tim Campbell
5D III, 5D IV, 60Da
