Macbook does not see camera

ALTERNATE WAY TO TRANSFER VIDEOS AND PHOTOS TO COMPUTER
If your videos and photos are stored on the memory card, then remove the memory card from the camera and insert it into an USB memory card reader. Connect this USB memory card reader and memory card into the USB port of your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos to your computer.
Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS TO COMPUTER
If your photos are stored on the memory card, then remove the memory card from the camera and insert it into an USB memory card reader. Connect this USB memory card reader and memory card into the USB port of your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS TO COMPUTER
If your photos are stored on the memory card, then remove the memory card from the camera and insert it into an USB memory card reader. Connect this USB memory card reader and memory card into the USB port of your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

Try removing theSD memory card from your camera and inserting the SD memory card into an USBmemory card reader then connect the USB card reader into the USB port of aworking computer. The computer will see this USB card reader and SD memory cardas an external storage device. You can open the camera photo folder and copythe photos to your computer.

The first problem is explained by the error message. Your camera is consuming too much power to go through a USB hub. Try connecting it directly to a USB port on your computer, without going through a hub.

The second problem is most likely related to the card reader. You didn't specify the exact model of Belkin reader so I can't give you a definite answer, but it appears the reader is designed for SD cards. Your 4GB card is actually an SDHC card. While it fits into the slot, it will not work with devices not specifically designed to work with SDHC cards.

To sum up: If you want to use a USB port, connect directly to it without going through a hub. If you want to use a card reader, make sure the reader is SDHC-compatible.
If you have additional questions, or some part of the above isn't clear, please feel free to respond to this post.

Consider NOT connecting your camera to your computer.

The best way to download pictures from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.

Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures from the card to the computer's hard drive, the same way you copy any other files. Or you can use Nikon Transfer or iPhoto or any other photo cataloging program.

Radio Shack .. ($12) ..
Take camera to the shore ... if they can't help... talk to manager .... they have it.

Buy a USB card reader, this will show your card (which you used in the camera) as a normal disk in finder

probaly a bad usb cable, get an usb mem card reader helps avoid problems like these...

Camera must be in point-to-point USB mode for remote tethering to work.
In menu with wrench icon, make sure USB is set to "P" point-to-point.