How do I install widgets to my dashboard (Safari and iPhoto disappeared)
Safari and iPhoto widgets have disappeared from my dashboard. How do I install them again?
MacBook Air
Do you mean to the Dock? If so, open Launchpad, find the application you want and drag it to the Dock. More info on the Dock: Mac Basics: The Dock holds your favorite apps, documents, and more - Apple Support
Re Dashboard, it isn't something I use so I'm not very familiar with it but from what I can see you cannot add iPhoto or Safari to it: Mac Basics: Dashboard gives you quick access to frequently used info - Apple Support