Chris says that upgrading to OS 10.3 will bring Apple's new Photos app on your Mac. He says it's pretty good, but it has a few flaws and bugs. One bug is that it will delete any pictures on your desktop in favor of your photos in iCloud. So if you don't have anything on your laptop you care about, go for it. it'll all be well. But Chris didn't lose any of his. They migrated everything to his Photos app with no problem, only reorganizing some. Chris says Photos is an update from iPhoto, but a clear downgrade from Aperture.