Migration Assistant

I don't think there's other steps. Migration Assistant is pretty straight forward. I remember very recently Apple made an update to Migration Assistant, so be sure to check for software updates. Another thing to look into is check the Console app for after trying the assistant to see if there's any more details about these "incompatibilities."

 

It is a lot easier to go from Mac to Mac with Migration Assistant. All you need is a firewire cable. Another option that has worked for me is to start a new Time Machine backup just for the transfer. When it finishes, point Migration Assistant to the fresh new Time Machine backup and everything should come over just fine. I was backing up to a Time Capsule via wifi, but to upgrade my HDD, I decided to make a TM backup to a firewire drive attached to my Macbook. When the backup finished, I switched off the machine, upgraded the HDD and RAM, popped in the SL dvd and installed the OS on the new drive. After the install was done, it asked me where to get data to bring over. At this point I could have browsed to the TC via wifi but I chose the new backup I had made to the firewire drive and everything went fine. Mail.app got confused but I didn't mind. It took minutes to get it set up again. All my apps came over. All my data. Now I'm running Lion and have made myself a recovery USB so that if I ever do another HDD upgrade and Lion's recovery partition isn't there I can pop in my 8 gig USB stick and install a fresh copy of Lion.

In the past, I used a firewire cable to move from my santa rosa Macbook to my current penryn Macbook. It worked fine. There are quite a few reliable ways to bring your stuff over from Mac to Mac. Take your time. Read up on it. Don't skip steps and you should get everything over in no time.