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I'm migrating data from my 2010 27" iMac to a new 2023 24" iMac. I purchased a Thunderbolt 2 to Thunderbolt 3 adapter and connected them and then launched the Migration Assistant. The data is transferring via my home network instead of via Thuderbolt connection. Ironically, the Migration dialog box says I can transfer data faster if I use a Thunderbolt connection. Estimated time is 72 hours...I don't want to start over because my old iMac is creaky and takes hours just to boot up. Anyone have any ideas?

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  • Thank you so much for the detailed answer...I will try that immediately
    – Daddio
    Commented Jul 21, 2023 at 19:17

1 Answer 1

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Just connecting the two computers via Thunderbolt isn’t enough. You have to create an IP network between the two.

  • Each Mac needs to have an IP address assigned to the Thunderbolt connection. Apple has an excellent guide called Use IP over Thunderbolt to connect Mac computers
  • Move this connection up so it’s the highest priority in Network Settings/Preferences
  • During migration, turn off your regular wireless or wired network to ensure all traffic goes through the TB connection.
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