Cameras that support WiFi work in an either/or but not "both" ... in that if WiFi is enabled, then USB is disabled. To use USB you must disable WiFi.
When using a USB cable, make sure it actually is a USB data cable and not a "charging" cable. Some USB cables only have the power-pins connected ... not the data pins. The safest way to be sure is to use the factory-supplied cable. While on this topic... make sure the cable is not worn or damaged.
On the Mac (or any computer really) ... make sure there are no other applications running that would use the camera. They can intercept the camera when you connect it... making it not appear to any other application.
There are several ways to determine if the mac itself sees the connected camera.
One method is to launch the "System Information" utility (it is in your "Applications" -> "Utilities" folder) and check the "USB" category on the left side. It should list all the USB devices it sees connected to the computer (It ONLY scans for devices when you launch it. If you connect the camera *after* the System Information utility is running you wont see it in the device list. You can select "File" -> "Refresh Information" (⌘R) and that will force it to rescan the list of attached devices.
Another method is to launch "Image Capture" utility (also in "Applications" -> "Utilities" folder). If any cameras are connect and if NO OTHER software is running that uses a camera (if something like "Photos" is running, make sure you Quit first) then you'll see a tiny triangle in the lower left corner of "Image Capture". Click the triangle and it will open the list of devices and as a bonus... you get a menu asking what application you want the mac to launch if that device is connected. I set my mac to not launch anything (I use so many different programs that I usually want to manually launch the software rather than have it auto-launch something.)
Tim Campbell
5D III, 5D IV, 60Da
