The Preview app also allows you to resize multiple photos and you can use this option in case you have too many images to be resized.ġ. 600 – If you want the image to be of very high quality, as used in advertising and other uses where high resolution images are required.ħ. Finally, click on the Ok button once you have finished resizing the photo (See image in step #5 above) Resize Multiple Photos on Mac Using Preview App.240 – 300 – If you will be printing the image.72 – 150 pixels – For images to be used on websites.This is helpful, in case you are also trying to reduce the size of the image.įollowing are the recommended image resolutions for images, based on where you want to use them. Making the photo Scale proportionally ensures that any change that you make to the width of the photo will result in a proportional change in the height of the photo and vice-versa.Ĥ. Next, you can choose whether you want to resize the image in pixels, centimeters, inches, percent, millimeters or points (See image below)ĥ. After selecting the resizing Unit, enter the new dimensions (Width or Height) for your image (See image below)Ħ. As you can see in the image above, the Preview App also allows you to change the Resolution of the images.

On the next screen, make sure that the option for Scale proportionally is checked (See image below) Once the Photo opens in the Preview App, click on Tools from the top menu bar of your Mac and then click on Adjust Size… option in the drop-down menu.ģ. Note: If you have chosen a different App as your default Photo viewer, then right click on the photo and select Open with > Preview.Ģ. Double click on the Photo that you want to Resize and allow it to open in the Preview app. Resize Photos on Mac Using Preview Appįollow the steps to Resize Photos on Mac using the Preview App.ġ. In case you want to keep the original photo, make a copy of the original photo and then resize the copied photo. Note: When you resize photos using the Preview App, you will end up losing the original photo as it will be replaced by the resized photo. However, you can easily get around this limitation by simply dragging your Photos from Photo app to your Desktop or any Folder on your Mac.

The only place where this method does not work is within the Photos App on your Mac.

How to change size of image mac