[header] How to use photos on macos [title] Add photos to your icloud photo library. [step] The photos app will automatically load any pictures you have stored in your icloud photo library. This includes pictures taken from any of your icloud-connected devices, such as your iphone and ipad. 
[substeps] When icloud photo library is enabled on your iphone or ipad, any pictures you take on them will automatically be added to your icloud photo library. See how to use icloud for details on setting up the icloud photo library on your devices.