Fast Image Viewer for your Mac

Fast Image viewer for Mac, opens your Mac images, really fast with a minimal tiny footprint, open sourced.

Download the latest release for MacOS

Instructions:

Download the latest release, open the archive, copy the app to you Application Folder.

You can drag and drop an image to the app, use open with dialog and browse for FastImage app.

To make FastImage for MacOS your default image viewer, control+click an image (or press 2 fingers on your trackpad), click on “Get info” go to “Open with:”, go to “Other…”, change “Enable” to “All Applications”, select FastImage app, click “Add”, then press “Change All..”

To go to the next/previous image, you can use the navigation buttons in the top bar, or use arrow left and arrow right. To zoom an image, use the zoom slider at the top, to reset the image zoom and fit it in the available window, double tap the image.

Source code