Why do your pictures from your sd card not show up in iphoto?

There are several reasons why pictures from your SD card may not show up in iPhoto. The SD card might not be properly connected to your computer, or the images may be in a format that iPhoto doesn't recognize. Additionally, the photos could be stored in a folder structure that iPhoto doesn't automatically scan. Try importing the photos directly from the SD card using the "Import" feature in iPhoto to see if that resolves the issue.