Can I drag and drop photos from Apple’s desktop Photo App?

Drag and drop from Apple Photos is not supported.  Unfortunately, Apple Photos has not supported the ability for users to drag and drop photos into commonly used photo editing applications, including Adobe Photoshop and many other third-party online services (https://discussions.apple.com/thread/6988568). We have reported the issue to Apple earlier this year and are waiting for a resolution.  As soon as this is resolved, we will publish an update.