I'm trying to migrate everything from my 3 year old Macbook Air to a new MBA. Don't have a thunderbolt cable (and neither machine has ethernet port), so I opted to do this over WiFi, only to find it quoted me 100+ hours! I know WiFi is slow, but this seems absurd and obviously won't do, as I'm leaving for a 2-week vacation in a day's time and was planning to bring my new laptop along. What are my alternatives here? Do I need to buy a thunderbolt cable just for this one-time migration? Can I do it with a USB cable connecting the 2 machines, or a USB cable to external hard disk w/ Time Machine backup? Another question, after I complete the migration to my new laptop, can it be backed up to my pre-existing Time Machine profile on the external hard disk? Also, will the process overwrite the newer version of MS Office I've already installed on the new machine, with the old version on the source laptop?