SuperDuper 3.5 Beta 1
Dave Nanian (tweet):
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 asr to finally make it happen. Without those changes, we couldn’t have done this in a supported way.
[…]
asrcopies at a low level and works a drive quite hard. In our internal testing, some SSDs couldn’t handle the load without intermittently overheating and generating errors.[…]
So, we decided that under macOS 11 and later, a Smart Update of a "volume group"—that is, a startup volume—will only copy the Data volume, updating your applications and data but leaving the system as-is.
Previously:
- The Role of Bootable Duplicates in a Modern Backup Strategy
- Old SuperDuper for Big Sur
- Booting an M1 Mac From an External Disk
- Carbon Copy Cloner 5.1.23
- Waiting to Update to Big Sur
Update (2021-05-05): Dave Nanian (tweet):
Startup volumes will often not show up in the Startup Disk Preference Pane in System Preferences under Big Sur. This does not mean the drive isn’t bootable—it’s a weird bug in Big Sur.
[…]
We’ve actually figured out how to get at least a little useful information out of the weird errors system tools produce[…]
