When you are architecting a web application or assembling a massive digital presentation on a macOS workstation, injecting dozens of oversized, multi-megabyte images will mathematically crash the rendering engine. To force the macOS neural engine to execute a geometric compression—permanently altering the physical dimensions and file sizes of multiple images simultaneously—you must deploy the Batch Resize vector within the native Preview application.
Executing the Geometric Batch Transmutation
The Preview application allows you to mathematically link multiple independent image files into a single processing matrix, allowing you to execute a destructive resize operation across the entire array in one millisecond.
- Locate your target image files (JPEGs, PNGs, etc.) in Finder.
- Highlight all the target files simultaneously (click and drag, or hold Cmd and click each file).
- Double-click the highlighted array to open them all natively in a single Preview window.
- Look at the absolute top-left corner of the Preview window and click the View Menu icon. Select Thumbnails to expose the left-hand sidebar matrix.
- Click on any thumbnail in the sidebar, then execute the absolute hotkey: Cmd + A. This mathematically selects every single image loaded into the engine.
Deploying the Dimensional Override
- With all thumbnails highlighted, look at the absolute top menu bar. Click on Tools.
- Select Adjust Size… from the drop-down matrix.
- A geometric modal window will spawn. Ensure the Scale proportionally checkbox is enabled to prevent mathematical distortion of the aspect ratios.
- Enter your target absolute parameters. For example, change the Width to exactly 1200 pixels.
- The engine will instantly calculate the resulting file size for the entire batch. Click OK.
- The Core Graphics engine will violently intercept the batch. It mathematically strips pixels from every single image in the array simultaneously, perfectly resizing them to your new parameters.
- Execute the absolute hotkey Cmd + S to permanently save the new, smaller geometries to your physical hard drive.