How I reduce image size in Mac OS
I have to use Mac OS’s Preview application to compress images for work.
It’s pretty good.
Here’s my workflow:
- Change file names to all lowercase (Automator app)
- Change underscores / spaces for dashes manually
- Get between 5 and 7% compression on I don’t know what but whatever (ImageOptim app)
- Select all images manually
- Open in Preview (double click)
- Select all images in Preview
- Change resolution from 300 to 72dpi (tools > adjust size)
- Wait for the changes to apply (I often see the Spinning pinwheel)
- Images are good to go but I usually further reduce height or with on a couple of them to not cross the 10mb weight
Now that I wrote that list, sounds like a lot, especially the part of waiting for the resolution to change.
I tried ImageMagick in the terminal but either I don’t know how to use it (most likely) or changing resolution doesn’t compress as much as Preview app.
I don’t know what Preview app does that makes such good compression (image quality remains good).
I like the results, I mind the wait a little. I thought ImageMagick will save me from the wait but results are not good. I’m thinking the next best thing could be an Adobe Photoshop droplet but I don’t want to use Adobe products.
If you know any way better than mine using almost built in or offline open source tools for MacOS, please let me know.