This is a sample to show the status menu on macOS. I used the following page as a reference. https://stackoverflow.com/questions/60393006/scaling-a-pdf-image-for-nsstatusitem-image
I used the Godzilla icon from here. https://icooon-mono.com/15689-%e6%80%aa%e7%8d%a3%e3%82%a2%e3%82%a4%e3%82%b3%e3%83%b3/