Looking for assistance here. Have an older iMac 24" 8.1 2.8GHz Intel Core 2 Duo (1TB drive) which is running 10.9.4 . Just opened the box today to my new iMac 27" 5k retina 3.5GHz Quad-core Intel Core i5 (3TB fusion drive) which is running 10.10 Anyway wanting to use the apple migration assistant to move my valuable mail, itunes, calendar and files and photos (especially my aperture library) I connected with Ethernet cable, and had migration running ok on both iMac's. Things work fine (confirmation on both sides, code displayed, etc.) until the target iMac is trying to find all the items to migrate. The old iMac is showing that it is transferring, but then the migration assistant crashes on my older iMac and return to the user login screen. This has happened on a number of occasions, and I tried with Ethernet cable (I had wifi turned off on both imacs) and just over wifi (with the ethernet cable disconnected). I'm a but frustrated right now, I was hoping to easily get my old files / setup over to my iMac as soon as possible. Anyone here with a similar issue, or how to best approach this ? Many thanks.