MacDaddy only works for Legacy SmugMug users.
If you're the "I never read the instructions" type, you can download SmugMug's MacDaddy standalone app here and dive right in! For the rest of us, here's the play-by-play:
Find the options.
The first time you click the Upload button? and select a gallery, you'll see a page with lots of uploader choices, including this one:
Note: If you use iPhoto, Aperture, or Lightroom you can choose to upload directly from these programs. You will find the links to these apps on that page, or you can get them from our wiki.
You'll be asked to save a file. When you open it, you'll see a green smuggy that you can drag right into your Applications folder.
Open 'er up and enter your SmugMug login info.
Drag and drop photos into the files tab, or click +.
Sel ect a Destination Gallery (or create one) and click Upload.
Have photos in iPhoto? We have a tab for you.
Check the boxes, select destination galleries, click Upload.
Tip: Send each iPhoto album to a different SmugMug gallery, all at the same time!