Failed To Personalise the software update. Please try again

This is Guess work , but something is your error message looks really Off

" Server not reachable" UserInfo=0×600002cc81 el (not displayed)}, NSLocalizedDescription=Could not personalize boot/firmware bundle.,"

It looks like the " Controller Firmware Version " has been damaged or corrupted

That or the computer is running in Reduced Security Mode

It would cease attempting the update on this machine

Then have a few suggestions ;

1 - Have the computer evaluated by the Professionals who have the Special Hardware Software and Expertise to diagnose the issue and offer possible solutions

2 - Make an Appointment at the Apple Genius Bar or call 1 800 MyApple and have them evaluate the computer

From my perspective, the maddening thing is that this problem is consequent to a very poorly considered design decision by Apple's software engineers.

Sure I have dealt with simple processor designs that can be bricked by a failed update of their firmware, but for expensive complex computers there are design options that allow for recovery from such a problem. The Mac's designers apparently thought that throwing away the logic board and replacing it was an acceptable solution.

Hi @MadMax889 - the thread is showing a little jumbled up for me in terms of chronology. Did you manage to do this with fresh install as stated above and is it working okay? How did you know what to do for this or was it a google/youtube situation?

I have gotten the same message for past two days, so would like to try your fix, Interestingly I also did a data transfer wizard from 2013 MacBook pro and I think the operating system was around High Sierra if I remember rightly.

Any advice would be much appreciated, thanks.

eva-marie241 wrote:

Hi @MadMax889 - the thread is showing a little jumbled up for me in terms of chronology.

Apple recently made some changes to the forum and it defaults to a Sort By "Best" view which is broken (at least in my opinion since it places the upvoted replies first, then seems to randomize the other posts). You can change the "Sort By" order to "Oldest" if you want a traditional style thread & timeline. This option is located on the right just below the initial post or any of the highlighted upvoted "Best" posts.

If you are logged into the forum with your AppleID, then you can change the default Sort order in your forum preference options, but this saved preference will only work while you are logged into this forum. I'm not aware of any way to have a forum cookie to set it to a default Sort By option if you are just browsing the forum otherwise. It is annoying and some contributors have already provided feedback to Apple about the broken nature here.

Thanks for providing an update to confirm.