Got my new MB pro mid-2014 yesterday. Began migrating over wi-fi only to learn that it will take 14 hours that I don't have. After 45 minutes I halted on both computers using command Q. My question, how do I safely wipe the new computer clean so that I can start again by transferring from time machine?
I suggest you use Apple Mac's Disk Utility, select the disk or volume in the LH column that you wish to clear, specify a format and name and click on Erase. Also select Security Options if you wish to prevent any recovery of previously deleted files.