Mac Migration Stall


I bought a new Macbook Air last week. I started the Mac Migration over 30 hours ago (via wi-fi connection)

Both laptops say - "About a minute remaining" - however this has been on the screen for over 8 hours now (as per image below)

Can anyone advise as to what i should do?
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The transfer on wifi is the lowest possible rate transfer. I suggest to wait, but nothing bad can happened if you are canceling the transfer: in the worst scenarios you have to enter in the  recovery mode and start migration assistant from there.
But next time try to connect devices by a network cable :)

Best regards!

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oo7mlAuthor Commented:
I'm waiting 8 hours on the 'About a minute remaining' screen :-)
oo7mlAuthor Commented:
I've just bought a thunderbolt cable now.

Is there anyway to stop it and restart it, without messing everything up?
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Create a reliable backup. Make sure you always have dependable copies of your data so you can restore your entire system or individual files.

You cannot cancel the migration process. The only way to stop it is to power down the computers. I should try with the new one first and after that, if the process won't stop, power down the old one too.

After that you must connect computers with thunderbolt cable and reload the process from beginning. The old computer should not have anything wrong, but the new one, in case of starting problems, start it in Recovery Mode and start the Migration Assistant from there

Good luck and let me know
oo7mlAuthor Commented:
Ok, if it fails, don't need to wipe the new one as it might have 200gb of data on it from the previous attempt?
no, it won't be necessary
Also run Verify Disk from Disk Utility on both drives to make sure you don't have a disk directory corruption problem.
oo7mlAuthor Commented:
Ok, so I cancelled the migration as it was running 48 hours.

I went out and got a thunderbolt cable... ran the process again but it said the new mac had no space.

I just tried to use the new Mac as normal to see if the files were there but they weren't... so now do I need to wipe the new laptop so I can start the process again with the thunderbolt cable?

Boot the new Mac in Recovery Mode, erase HDD from DiskUtility and then start Migration Assistant

Good luck and let me know
oo7mlAuthor Commented:
Ok cool, thanks.

I'm in work now so won't be able to do it for another few hours.

A few (silly) questions:

If i erase the the HDD, what operating system etc will be on the new Mac when the migration is finished?
The OS from the old computer.
I had this same situation when I got a new Mac Pro.  I foolishly tried to do it via Ethernet cable, both crossover and through my switch.  Most of it went really quickly, but it got hung for over a day trying to copy the last part. I broke it several times as mentioned above and each time I deleted anything of mine that had been brought over from the old system.  Fortunately, the system I was trying to copy from was an old silver Mac Pro and I removed the drive (SSD) and hooked it to the new Pro via a USB3 cable/external enclosure.  The whole copy took 17 minutes. While you don't have this option exactly with laptops, you might try finding a USB3 or whatever high speed cable both of them support and do it that way.  

Another thing I did, while I was experimenting, was to have MA copy over everything EXCEPT my applications. Even over Ethernet that went fairly well. And then I just reinstalled the applications. The odd thing is that my Applications are a fairly small part of the whole copy, so I'm not sure what MA is doing there as it copied over way more data in a much shorter time frame.
oo7mlAuthor Commented:
Thanks, but that defeats the purpose of the MA... it's supposed to basically clone your setup :-)

I was thinking it might be better to just copy everything over too and start fresh.
I agree and if you throw enough bandwidth at it - like with USB3 - it does work quickly. I have no idea why it would hang just at that last part, but I've found ample evidence to support that your's and mine are not unique situations. I've also done what you are suggesting and that's to create a new user account and just copy everything over and then reinstall the applications and that also works well.
The Thunderbolt cable will be faster.  You can boot the older Mac into Target mode and connect the Thunderbolt cable to see the drive.

How much data did you have in your user account?  If it's in the hundreds of gigabytes, then I suggest you migrate everything else but save the user account for last.  You can run Migration assistant multiple times and just migrate different portions of the system piecemeal instead of all at once.  You can also use rsync -a or cp -pr on the command line to Migrate the user account.

You can always redo the migration any time.
oo7mlAuthor Commented:
Thank you.
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