Here is the solution for your problem. By following these simple steps you can easily transfer photo's from the photobooth app on macbook to iPhone.
The pictures and movies you make in Photo Booth turn up at the bottom of the Photo Booth program in an on-screen photo strip. To look at the image, just click the corresponding thumbnail. You have several options for sharing the picture or movie with others. By choosing the appropriate button:
You can make your Mac Photo Booth picture your Account Picture or Buddy Picture (for use as a buddy icon) in iChat.
You can e-mail your Mac Photo Booth picture through the Macs Mail application or send it to your iPhoto picture library.
You can drag your Mac Photo Booth picture to your desktop.
You can export the thumbnail by selecting it, choosing File from the Photo Booth menu, and then selecting Export. If it was a four-up shot, it gets exported as an animated .gif file that you can use in Web sites or as your iChat buddy picture.
If youve collected several Mac Photo Booth pictures that youd like to share, you can show them off in a slideshow. Simply choose View→Start Slideshow.