There are a few steps you can take to open a photo in Photoshop:

  1. Choose the photo you want to open.
  2. Choose the “Open with” option from the menu on the left.
  3. In the “File” dialog, choose " Photoshop."
  4. In the “Open With” dialog, choose “Photoshop Camera Raw.”

How to Open Images as Layers in Photoshop

Check out How To Make A Smart Object In Photoshop?