Batch resize images on Mac with Preview
You can easily batch resize groups of images within Mac OS X by using the included Preview app, there is no need for any additional downloads or expensive photo editing applications, only Preview, which is free with your Mac! Here’s how to do it:
Batch resize images in Mac OS X
* Select all the images you want resized and open them within Preview
* From Preview, select the images that you want to batch resize from the drawer (Command+A will select them all)
* Now, go to the menu labeled Tools, and then Adjust Size
* Enter a value for what you want the new width and height to be
* Next, navigate to the File menu and click Save All
* All the images you selected are now resized!
This works in Preview that is included in 10.5 and 10.6, happy batch resizing!

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If you are using SL you have to go to Preview/Preferences/General –> “open all files in one window”
now THIS is cool, I hate launching into bloatware Photoshop just to batch resize pictures and I had no idea Preview was so capable. If Apple adds a few more features to Preview there will be little reason to use Photoshop at all…
Be careful when you use this tip which can be useful, you’ll lose the original sized picture… There is no choice for the saving name or place.
GRACIASSS!! Terima kasih.
[...] to resize a ton of pictures? Instead of downloading a third party application or using Preview, you can use Automator to handle the entire operation, even renaming the images to indicate they [...]
Excellent thank you!!!!!
Rick