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Get Pictures off the Macintosh's
Ref: https://www.macworld.com/article/3164408/how-to-find-all-photos-on-your-mac.html
The simplest way to do this with Spotlight is via a Finder-based search, for which you can create a Smart Folder to repeat it later without losing the window settings. You have to go through a little rigamarole to get the fields you need:
Press Command-Option-spacebar to create a Finder Spotlight search window.
In the upper-right corner, click the plus (+) button.
Now hold down the Option key, and the plus button in the upper right next to the entry that was created (which starts “Name” and “matches”) changes to an ellipsis (…). Click that.
The ellipsis button creates an Any of the Following Are True entry, which is what you need to have multiple criteria for images in a single search. Any is the right selection, so you can leave that alone.
Under Any, change the pop-up buttons to Kind, Image, and JPEG.
Click the + at the end of that line, and create a field with Kind, Image, and TIFF.
Repeat step 6 for GIF and PNG (and BMP, if you think you have any of that format, primarily used in Windows).
Click the Save button in the upper right so you can recall these criteria if something goes wrong. Name it something like “Find all images by type”. (When you click Save after naming, the criteria disappear and the Smart Folder icon and name appear the top of the window. You can click the Action (gear) menu and choose Show Search Criteria to display them.)
Set up the destination to which you want to copy all images, like a folder or hard drive.
In the results window, click and then press Command-A or choose File > Select All.
Drag the selection to the new destination.
