Caesium

Caesium is a tool for compressing your photos so they occupy much less space on your Mac. In the simplest way, you can select multiple images and considerably reduce the size of these files without having to resort to other programs.

Thankfully, compressing multiple images with Caesium is a piece of cake. Simply drag each of the images to the central area, then select the export quality and desired size for the resulting files. This way, you can always decide, on a scale from 0 to 100, the sharpness of all the images you want to compress.

Once you've set up these parameters, you can select all the images you want to compress individually or in batches. In addition, you can choose the location where you want the resulting files to be saved.

Download Caesium's executable to access lots of very practical options for reducing the size of many images at once. With this tool, you'll have no problems selecting the best image quality for your needs and reducing multiple files to that size.