New Features in Photos 9 on Sonoma

Photos 9 on macOS Sonoma offers quite a few new features. See: https://www.apple.com/macos/sonoma/pdf/macOS_All_New_Features.PDF

The key improvements for Photos mentioned in the document:

• "Pets in the People album. Individual pets are now included in the People album just like friends or family members.
• Siri Suggestions in the People album. Photos will intelligently suggest matches from Contacts in the People album to help you name individuals faster.
• Improved People album accuracy. The People album recognizes significantly more photos of your favorite people, even if they're turned away from the camera.
• Drag to reorder in a memory. Reorder photos and videos within a memory by dragging and dropping them into a new position in the timeline.
• Add content to a memory. Add any photo or video from your library to a memory.
• Smart copy and paste edits. Copied and pasted edits now intelligently match exposure and white balance between images.
• Improvements to iCloud Photos syncing. iCloud Photos syncing will be paused less frequently, and when syncing is paused, a Sync Now control will appear.
• iCloud Links on macOS. Share photos and videos stored in iCloud Photos by generating an iCloud Link."
• Widgets: Photos album widget. Select a specific album from the Photos app so photos from your favorite album appear in your Photos widget.
• Photos privacy prompt improvements. An embedded photo picker for apps lets you pick photos to share within the app's experience, without sharing your entire library. When an app does ask to access your entire library, you'll see details of how many and which photos will be shared before you make a decision. If you grant access, you'll receive reminders from time to time.
• Vertical text recognition. Live Text recognizes vertically oriented Chinese, Japanese, and Korean text.
• Improved handwriting recognition. Live Text recognizes handwritten text even better.
• New Live Text languages. Adds support for Live Text in Thai and Vietnamese.
• Expanded domains. Visual Lookup: Discover similar recipes from photos of food, map routes to stores identified in photos, and the meaning of signs and symbols on things like laundry tags.
• Visual Lookup: Lift multiple subjects from background of photos and videos and place them in apps like Messages.
• Visual Look Up in video. Look up information about objects that appear in paused video frames. "

The User Guide for Photos 9: Photos User Guide for Mac - Apple Support