An application for OS X which provides access to the “GB USB Smart Card 64M” Gameboy cartridge.
The manufacture’s software is only available for Windows and the Mac alternative is EMS Flasher, a command line tool by Mike Ryan.
This app provides a simple GUI for EMS Flasher which should make life easier for those not familiar with terminal commands or anyone looking for a quicker way to manage their cartridge.
Download: https://github.com/hexensemble/gb-usb-64m-cart-mac/releases
Tested and working on Intel based Mac running macOS Big Sur.
IMPORTANT: You will need to right click the application then click 'open' before macOS will let you use it. The first time you do this will fail but the second will work.