Due to various reasons I am not able to Downgrade my Mac's to Mojave, running Catalina and Big Sur. So I still have one Mac that is on El Capitan and an older laptop with Windows 10. My understanding is that I am going to have to unregister the Mac with Catalina and then install, transfer files, on the Mac with El Capitan and register that one... But one question if I choose the Win 10 will my License's work for Windows??

Thanks,

Bill...

Oh also any idea on update date?