How do you download pictures from a sandisk to your iMac?

The MacBook photo application/library is iPhoto.

iPhoto is a cataloger of information about the photos on your Mac. This info includes the photos themselves, as well as the names of faces and events that you link to the photos. There are two folders that have the photo names. One is the full size images and the other is the thumbnail images. Don't mix them up when you are looking for a photo. The thumbnails are in a DATA folder.

To move photos from your Mac, you just need to find the real photos, not the data in iPhoto. So in iPhoto select photos on the left pane.

Find either a photo in a group that you want to move, or a range of photos that you want to move. Right Click one to get the menu.

Look down the menu and find "Show File" or if you have modified the original and want the original, select "Show Original."

A Finder window will open that contains the photo you want. The folder will contain others you might want. You can decide now if you want the photos to be on the Sandisk on the index layer or in a folder. I think a folder is best. Make a new folder on your desktop and COPY the photos you want over to it. You can select a group and press Command C. Don't drag them to the folder! you will be removing them from iPhoto as well as ruining the iPhoto Index.

Open the new folder and PASTE the photo there. Press Command V.

When you have finished copying the photos

When you have all the photos in the folder, close it. Click on it. Press Command C.

Open the Sandisk, and go to where you want the folder to be. Press Command V.

Depending on how many and how large the photos are, it may take some time to copy them to the Sand disk. Finder will make a little progress bar to let you know this.

Be sure to eject the Sandisk when you want to remove it. Don't just pull it out of the USB port. AFTER it disappears from the desktop, you can pull it out of the USB port.

Enjoy iPhoto!