If you find an in a drawer and need a quick fix for a Bluetooth mouse or to transfer a PDF file, it is a functional "throw-away" device. It works solely because modern Windows is smart enough to cover for it.
Most older EPoX adapters are not natively supported by modern macOS. They are best suited for Windows-based systems. Update Bluetooth drivers in Windows - Microsoft Support epox btdg07a bluetooth usb adapter driver
Choose , then Let me pick from a list of available drivers on my computer . Select Bluetooth as the device type. If you find an in a drawer and