SuperDuper no longer works after Big Sur installation in my iMac

Neither does CarbonCopyCloner as Apple has closed off most ways to access info those two apps need.

I know that CCC is working on it and is getting close, but not reliable yet. So, do check with SD - at the moment, I can make a backup with CCC, but would have to download/install the OS via recovery onto that external in order to make it bootable.

So, I am not installing Big Sur onto my main machine until I can make a reliable bootable clone.

My suggestion, jimpal, if you wish, is to wait for a reliable version of SuperDuper to work with Big Sur. Visiting Shirt Pocket, David Nanian has already replied re Big Sur. I, too, am a long time user (since 2008). Dave stated that it would be foolish at this stage of just being introduced to Big Sur to rush a version that may work with Big Sur. He recommends using Time Machine in the interim. Dave is working on a solution for a version that he feels is worthy of being released that will work to the standards he maintains for Shirt Pocket's SuperDuper which Dave founded. I, too, was very disappointed hoping that Apple would have released to creators like Dave in advance and with adequate time to develop a proper release. There are also a number of other apps I use that are advising their user base that they, the engineers/creators are taking their time before rushing out a version. Frankly, I rely on these apps and miss them, but I also respect Dave and others who are not going to rush a version that will turn around and bite us and then in turn Dave. So I am just being patient. Time Machine is set to do its thing but I never rely on Time Machine. I doubt what I have posited is any surprise and a source of. help, other than to join in the lament. But I know how to be mindful of how Dave does things, and waiting is...

Best regards,

REShaman

You say use TimeMachine in the interim, however on Catalina I was using TimeMachine with my NAS storage device on my network but this no longer works on Big Sur as there is an issue with TimeMachine connecting with NAS devices using Big Sur!

I still have not gotten SuperDuper to work on OSX 11 Big Sur either.....however, I checked the permissions for the destination drive, (on Get Info) and found that only System had read-write permission. I unlocked permissions and changed both Admin and everyone to read-write successfully. Then it would recognize the external drive as a destination. It spent over 20 minutes "preparing" Macintosh HD, but no backup! I re-formatted it in disk utilities, again changed the permissions to read-write. Again Preparing Macintosh HD, but no backup.

Or did I get that wrong?

No, you did not. If you spend some time here, you will notice at some point that some posters do not appear to read some of the posts in a thread except the original subject line or post.

Just kick back and wait. The developer is working on a Big Sur compatible update. Meanwhile, use time machine or put down the money for Carbon Copy Cloner, which I understand is now working with Big Sur.

Mike Bombich (CCC) has been working on it for months. Until Apple allows them the access they need, there isn't much they can do.

I have a beta of CarbonCopyClone (CCC) and it appears to work under Big Sur.

There is no Superduper version for Big Sur yet.

https://www.shirt-pocket.com/blog/

If one wishes to use interim solution - that is one choice. And yes have also been aware SuperDuper intention to make compatible but at this writing is not