Can you export photos from a mac back to a Nikon camera?

I have a school computer, and they are taking them back up tomorrow I need a way to export my photos back into my Nikon camera, because my mom refuses to buy a flash drive. If i don't figure out a way to export them back, all my photos will be erased =

1.take your memory card out of your nikon camera.
2.Plug it into the memory card slot on your mac.
3. Drag the pictures from your mac onto your camera memory card.

There's a way to put your photos back on your camera. There are, however, some other solutions.

First, the way you want:
If your Mac has a memory card slot, you can take your card out of your camera, insert it into your computer's card slot, and drag the pictures on to it. If you don't have a card slot, you can buy a USB card reader somewhere.

Other options:

1) Sign up for a free file storage service such as Dropbox or Google Drive. To sign up for Dropbox, go to http://db.tt/UfoED8Xb. To sign up for Google Drive, go to drive.google.com.

2) Email the photos to yourself.

3) Walk to Radioshack or any other store that sells flash drives, bring about $20, and get the most expensive flash drive you can with that amount.

Glad to help!

Can you put files from the computer to the camera? Yes. Will the pictures show up in the camera? No. Will the pictures stay in the camera? Yes. Can you transfer them from the camera to another computer? Yes.