1. GIMP Download GIMP Download GIMP for Mac GIMP is the option that you should try first when trying to open and edit a free PSD file after Photoshop. Not only is photo editing software most like ...

A PSD file is an image file format containing detailed elements such as layers, alpha channels, and transparency, which are not found in standard image file extensions like . JPEG, . PNG, or . BMP.

Saving over the PSD could ruin the file if you intend to open it back up in Photoshop later, so you should only use the tool if you plan to edit everything in GIMP.