Sharing Photo Albums (My Albums)

Do you want just to show your photos, so others can view an album?

Then you may want to create a shared photo album, as described here: How to share albums in Photos on your iPhone, iPad and Mac – Apple Support (UK)

Shared albums can be viewed on all Mac OS system versions, since MacOS X 10.8 Monterey, and users without an Apple platform can browse them with a web Browser, if you share a link. The photos may be scaled down, if they are larger than 2048 pixels on the longest edge, and some metadata will be stripped. The shared albums do not count against your iCloud Storage plan.

If you want to share albums to work together on the images, in full quality, and all recipients are having macOS 13 Ventura or iOS 16 installed, you can share selected photos as a shared iCloud Photos Library. Then all metadata will be shared, the photos will be shared in the original quality, and others can add adjustments or edit the metadata and these changes will sync back to your version of the shared photos. The cloud storage for the Shared iCloud Photos Library has to be provided by the person who is setting it up. The iCloud Shared Library is only sharing the photos, not the structure. The recipients will not see the albums you created, only the default structure Days, Months, Years, Media Kind. You could however add the name of the album as a keyword to the photos in each album, then the people you invite can find the photos in smart albums.

See: How to use iCloud Shared Photo Library - Apple Support

Sorry but you can not share an existing album with others!

You would have to create a new "Shared Album", this can be shared with others that you invite to this album.

Please read this, it should provide the needed information.

Create a shared album in Photos on Mac - Apple SupportOfficial Apple Support › guide › photos › mac

How to use Shared Albums in Photos on your iPhone, iPad, and Mac - Apple Support

A shared album will contain smaller versions (2048 pixels on the long edge) of your original photos, therefore be very careful when you think about deleting the original photos!

They will be in the sequence of your import in this album, you can not sort them after they are added!

Ralf