Union

Union is a free menu bar app that makes it easy to combine multiple images into one. - Launch Union and click its menu bar icon to open the panel. - Drag and drop images into the app, or click Browse Files to select them from Finder. - Review the live preview, remove images individually if needed, then click Open Result or Share. Union is designed for quick, simple image stitching without leaving your desktop. Terms and conditions: https://www.thatfactory.com/tos