- Click on the picture with your mouse so its highlighted
- Press the cmd key and the letter i at the same time
- A new window will open with info about your photo
- Look under kind for the type of photo and size to check the image size is over 100kb
- Right click on the picture once with your mouse
- Choose Properties.
- The "Size" line on the Properties tab shows the image's file size - check if over 100kb