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There are things you can do, if you have an external Thunderbolt 3 drive (USB-C isn't sufficient), but even that won't work if the internal drive is dead. Note that, as I indicated above, M1 Macs can't readily boot from external drives. The result contains all your data and applications, can be restored in a few different ways.and can even be made bootable. and I've come up with a weird-sounding workaround that.works!īasically, you can use SuperDuper to copy the Data volume of the volume group. I've been testing this out for a while in-house. It built on the APFS support and scheduling fixes we put into the previous version.and added new things for compatibility with Catalina.īut.what if it didn't do that? What if SuperDuper was. SuperDuper! 3.3.1's magic was all about dealing with the split startup volume. And so, as you've seen, that copy generates errors or seems to hang right at the start (because it's thrown exceptions that stop the copy). It tries to do all the special stuff that we had to do for Catalina, and those things no longer work. For that, it's asr or nothing.īut, 3.3.1 doesn't know that. So, as of Big Sur, 3rd party tools like SuperDuper can no longer make bootable copies on their own. And even that didn't work at all until November 5th of last year-just before Big Sur's official release.Įven now, as of the time of this writing, asr won't make a bootable copy of an M1-based Mac. Due to the new Sealed System Volume, use of asr became mandatory if you wanted to make a copy that was bootable. That ominous sign became terrifying reality in macOS 11. They fixed that in 10.15.6.but it was a rather ominous sign for the future. In macOS 10.15.5, though, Apple broke 3rd party copy tools in a way that couldn't be worked around without the use of asr, a low-level drive copy tool that has its own issues. We did a ton of work that year to support this new setup in a way that was transparent to the user SuperDuper automatically creates the proper volumes, converts the drives to APFS as needed, etc.

In Catalina, as I explain in Breaking the Tape, Apple split the startup volume into two parts: the System volume and the Data volume.

And for that, we need to go Back.to the Future! Huh? However, after wracking my brain for far too long, I've come up with a workaround that will let you make the backups you need to save your files, and to supplement your Time Machine backup. I know that's been a disappointment, but that's where we are with v3.3.1. Right now, as many of you know, v3.3.1 will work with non-boot volumes, but it won't work with volumes that have macOS on them, because it will try to do some of the things that no longer work in macOS 11. We're currently blocked on some issues I don't have direct control over, and as such I don't have a new version for you that fully supports Big Sur, nor a timeframe for when that will be released. Bad newsĪs you know, SuperDuper 3.3.1 cannot copy a volume with Big Sur on it. Sorry it's been a while, but it's been a busy time.