Adjust Multiple Images in Camera Raw
If you’re using Camera Raw, you can adjust several images at once by first selecting the files you want in Adobe Bridge.
Then right-click (Mac: Control-clicking) on any of the selected images and choose “Open in Camera Raw” from the drop-down menu.
When the images open up in Camera Raw, Press Ctrl + A (Mac: Command + A) to “Select All“. Now that all the images are selected, any adjustments made will be applied to all.