Dragging photos out of photos to desktop with all metadata

Perhaps some background information, about the different ways of getting photos out of Photos will help:

The photo you are seeing in Photos does not really exist, until you are exporting it. Photos is storing the unmodified original, the metadata, the history of edits in the Photos Library, distributed across the database files. It also keeps a current preview and a thumbnail for browsing. But the current version of your photo is living in limbo and will only be rendered as an image file, when we need it outside Photos and share it or export it.

When you share a photo or export a photo Photos will render the finished version as a file, according to the specification.

When you just drag a photo out of the browser however, you are dragging the current preview of the photo - and it is a game of chance, what you will get. Do it only, if you just want a preview for embedding in some presentation, where the file size, quality , and metadata are not important. File > Export lets you specify exactly, what you will get. Use the hidden menu "^" to the right of "Kind: JPEG" to reveal the quality controls.

If you want all metadata, you need to do file>export rather than drag drop.

From my tests drag/drop only exports the description, whereas with file:export, you and export title, description keywords and location.

(applies to photos 5 / catalina)