EXIF date and location of photos on iCloud

Does this mean that adding/changing these data on Photos-macOS doesn´t really change the EXIF data? I mean: is it just a addition/change that only iOS/macOS recognize?

Photos never changes the original file at all. When you add metadata (date and time, location) to a photo, this will be stored in the edited version in your library, not in the original image file.

If you want to export an original from Photos and save the metadata, you can select to write an XMP sidecare file in the same folder. Import this sidecar file together with the original image file into other applications. Some can read them and recover the data, time, location, title, keywords from this file, when they import the original photo.

If you want to embed the metadata into the image file, you have to export the edited version, in the original size and with the highest quality. Then you will get a new image file, with the adjustments and the modified metadata burned in.

In Photos on your Mac select the photos, then use the command "File > Export > export ... Photos" or use the key combination ⇧⌘E

You will now see a drop-down panel like this:

• Click the "v" to the right of "Photo Kind".
• Select "Full Size" and a high quality.
• Then enable all checkmarks to include the metadata and the location.

My pleasure 😊