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I just ordered a new 27" Late 2015 iMac. I'll be moving my data from a 27" mid-2010 iMac. What's the recommended medium for the migration?

I know how to use Migration Assistant, but the old iMac has Firewire (no Thunderbolt) and the new iMac has Thunderbolt (no FireWire).

Is an Ethernet cable my best bet? It'll be faster than wireless, but I suspect still pretty slow.

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Wired ethernet (gigabit on both ends) will be every bit as fast as Firewire to Thunderbolt and without the cost of the adapter.

Depending on how noisy your Wireless environment is, you might have a limiting factor in the speed of the old iMac hard drive that's lower than WiFi throughput, but wired ethernet is so much more reliable, I'd do that if you can.

If you decide to try a wireless set up, use the fast new Mac to create a WiFi network and join the old iMac so that all the radio speed is dedicated to the transfer if you wanted to go that way with more than 10 GB of files to transfer (presumably).

  • Thanks! Will a standard cat5 cable work? Or will I need to get a crossover cable? – Bill Oct 26 '15 at 0:44
  • @bill Any cable works - the chips in Apple Ethernet handle the pin swap automagically. Cat 5e is best for longer runs, but 5 is fast enough. – bmike Oct 26 '15 at 1:41

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