I’m trying to get the transfer started and myold computer says that authentication Failed it was unable to retrieve credentials for authorizing user

Hello Eganlynn! Thank you for participating in the Apple Support Communities.

We understand that you’re unable to migrate your information from your old Mac to your new Mac because the security code isn’t appearing to authenticate both Macs together. We'd like to look into this with you to see how we can help. 

Great thinking to try the steps outlined in Move your content to a new Mac to resolve this issue. 

Are both devices up to date with the latest macOS available to them? Update macOS on Mac

As stated in the article, “Install all available software updates on both computers. If your old Mac isn't using OS X Lion or later, and your new Mac isn't using OS X Mavericks or later, follow the Mountain Lion migration steps instead.” You can find those steps here: How to move data to your new Mac using Mountain Lion and earlier

Make it a great day!

Hi jdo! I'm having the same issue -- it's not a question of the security code not appearing. As soon as you start migration assistant and click "Continue" from the first screen, this error pops up:

I'm on an M1 so I don't have an SMC to try resetting, but I've tried everything else I can find and have not had any luck. How can I and others who have this error get past it to migrate?

(I literally just got a brand new MBP so this as you can imagine, being blocked on this is quite frustrating!)

Thanks for your help!