How to resize, rename, or convert to JPG with your Mac computer.
Download this Automator Workflow file: luqmanmarzuki.com/files/image-resize-rename.workflow.zip
Use Automator to do batch image processing
After you download the file, extract and open it. If there are a popup box about security question, follow the instructions to be able to open the Workflow file with your Automator app. After you're able to open it, you'll see a window just like the one pictured above.
On the first box, add the image files you want to edit. Then on the second one, set a destination folder you preferred.
The last three boxes are the actual operations that converts, resize (scale), and rename the image files. You could easily remove the ones that you didn't need.