With the latest beta version of macOS Sierra 10.12.2, it seems that Apple would have fixed a bug that had become too common and that caused that, for some users, the new MacBook Pro gets stuck during the file transfer process to an external HD or SSD hard drive connected to one of the Thunderbolt 3 ports when they tried to back upd of your data, settings and files via the Time Machine utility which is part of the operating system itself.
As we have been able to read in MacRumors, Dave Miles, one of the forum users on this website, has stated that Apple's own head of software engineering, Craig Federighi, had contacted him. Through an email, this senior company official apologized to Miles for this inconvenience, at the same time that he confirmed that the problem had already been fixed with the fifth preview version of macOS Sierra 10.12.2.
MacBook Pro Crashed While Backing Up
The veracity or authenticity of said email message could not be confirmed "beyond a reasonable doubt", they point out from the media, however, other testimonies would come to attest that the problem, indeed, would already be solved.
These testimonials are also offered in a very limited number, barely half a dozen however all these users claim that the fifth beta version of macOS 10.12.2 fixes the crash problems they were suffering from backing up their MacBook Pro to an external storage drive via Time Machine and a wired connection. Some users had also reported the existence of crashes when transferring files between two external storage drives.
TreadEverSoLightly, another member of the MacRumors forum, explained very concisely what this problem is that other users of the new Apple MacBook Pros were also facing:
I'm already on my second MacBook Pro. I picked it up last Wednesday and swapped it out for another model two days later after experiencing it freezing while my laptop was backing up via Time Machine to an external HD. The computer hangs during data transfer and refuses to recognize my inputs. It then hangs and restarts.
What is the specific origin of this failure?
For the moment, It is not yet clear what the specific problem behind this MacBook Pro crash is while making a backup using the Time Machine utility; some users speculate that the reason could be in a problem with the USB controller, firmware or certain software problems, since in all cases it has occurred when backing up through a cable and not wirelessly. Other users, however, consider that the key to the problem would be in the size of the files, in such a way that it would be the transfers of large files that would have contributed to this failure, something that, in any case, should not happen.
In any case, the important thing now is that the problem seems to be solved and the affected users have already been able to make their backups with absolute normality.
Another member of the MacRumors forum, saba01, seems to confirm the importance of these large files in his testimony, at the same time confirming that after two weeks of complaints, the problem is finally gone.
I had the same problem. My MacBook Pro crashed while transferring large files (more than 4TB). I have installed macOS 10.12.2 and the problem has been solved! Yesterday I did a 40TB backup with no problems at all!
Probably macOS Sierra 10.2.2 will be officially released before the end of 2016, once the beta testing phase, already in an advanced state, comes to an end.
