I have a new iMac on order and since it does not have firewire ports I am wondering what to use for content migration connection from the old (20 inch iMac) to the new one.
Is my only opion a USB cable?
The link you gave does not answer my question. The newest iMac doesn't have a firewire port so that option is out.
I suppose I will need to use network connection. But I have over 250 Gig data and applications I need to migrate to the newest iMac and I am concerned about the time this will take.
Are there specific instructions for migration using network? I have Airport.
The link does give you the supported connections.
Wireless migrations can take forever and aren't as stable. Your best options are direct Ethernet cable connection, or get a thunderbolt/FireWire adapter and a FireWire cable.
If you have a time machine backup of your old computer on an external drive, you can plug that in to the new computer and migrate from that.
I just took delivery of my new iMac about a week ago. I used my external HD Time Machine backup (with a Firewire connection) and connected it to my new iMac with Apple's Firewire to Thunderbolt adapter. With Apple's Setup Assistant (which runs the first time you power up your new Mac) I was able to transfer everything over (about 350GB worth) in about 3 hours or so.
You can either choose Setup Assistant at first boot, or Migration Assistant later on. Because I didn't want to create another user account, I chose to use Setup Assistant when I first powered up my new iMac.
I see now that I can use a direct Ethernet connection. I hesitate to use the Time Machine drive for content because I don't think it would be as smooth in getting settings from System Preferences. I don't like having to do logins and the like manually ever.
I am curious as to why some people would choose Setup Assistant over Migration Assistant. You did. Any particular reasons for this?
I chose Setup Assistant because of advice I was given here, actually. Both Setup Assistant and Migration Assistant work well, but I didn't want any hassles than can ensue with Migration Assistant if you enter a username during the initial setup process that's the same name as what you'll be bringing over with Migration Assistant.
Using Setup Assistant all of my preferences seemed to make the move just fine. I had to arrange Apple Mail the way I had it before, but that was quick and easy. Even my Dock, which I had on the left side of my screen, appeared in the same location on my new iMac.
(Your mileage may vary... ).