Genesis 41 Emulator by Laurent Spohr

[rprosperi]

Warren's MODFile utility will examine and extract .rom files from a .mod file, however it is a windows program only. But the source is also available, so you might be able to get it working on macOS, in which case, please share it with both Warren and here for other Mac users.

http://www.ho41.org/LibView.cfm?Command=View&ItemID=608

Copy the above url, paste it to your address bar, change 'ho41' to 'hp41' and proceed.