Why can't I download images from a shared Photos album to me mac?

I created a shared album and invited family members to it. My cousin added some photos to it as well.

I just went to save her photos to my iMac but it doesn't allow me those menu options.

I looked up support, but it has all options except the new PHOTOS app for mac? What can I do?

ICan photos and videos be saved or downloaded from a shared album?

Yes. After photos are shared, anyone who can view the shared album can download and keep them permanently. Videos can only be downloaded to a Mac or PC. On an iOS device, videos are streamed from iCloud and can't be downloaded.

• On a compatible iOS device, you can save photos to your Photos tab or Camera Roll.
• In iPhoto or Aperture for Mac, you can add or copy shared photos or videos to your Library.
• On a Windows PC, you can copy photos and videos from a shared album to any folder.
• On the web, you can download photos and videos directly to your computer from the detail view of each photo or video.