Dave Nanian, writing in Shirt Pocket Watch:
As such, we can finally release a Beta that works as expected on both Intel Macs (now) and M1 Macs (assuming you have installed 11.4 Beta 1 or later).
To be clear, this is only possible because Apple made it possible in macOS 11.4. I’m certain it required changes to the M1’s startup process and to
asrto finally make it happen. Without those changes, we couldn’t have done this in a supported way.
I’m really happy the teams involved made the effort.
I can start thinking about upgrading to Big Sur once 11.4 and this version of SuperDuper! officially ships.