You can add images to menu items. Supply the
:image-function initarg when creating the menu, as illustrated in
Note: on some platforms support for images in menus is limited to menu items without text and/or images without transparency. If pane-supports-menus-with-images returns true, then images are fully supported in menus.
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017