Moira is the core of vAmiga, a user-friendly Amiga emulator for macOS. Check it out today.
Looking for 8-bit? VirtualC64 is a Commodore 64 emulator which is as user-friendly as vAmiga.
Peddle is the virtual CPU driving VirtualC64. The CPU core is maintained in a seperate repository and is as easy to integrate into your own application as Moira.