I will be completely new to OS X and Macs, when my machine turns up in a couple of weeks. I have the rMBP 2.6/512 SSD/16 on order. I am working through how I am going to set it up. In planning ahead, I would expect to sell the machine in the future ready for the next upgrade! I will be running my life on the machine, company accounts etc. So, in order to sell it I would want to do a complete secure erase of the SSD. My understanding from reading around is that the way to effectively do this is to have had file vault set up from the beginning, and that way you can just scrub the password and that effectively makes the data inaccesable. Question 1: Is using filevault the only way to securely erase the SSD? Question 2: Is my thinking correct in that you need to set filevault up from the start for this to be an effective way of securely erasing the SSD? Question 3: Does it lead to a performance hit using filevault? I have read some things somewhere suggesting anything up to a 25% hit on performance, however I understand that some SSDs now come with hardware enabled encryption that stops any performance impact. I also understood that the iPad was using encryption as standard and would be surprised that such a performance hit would be embedded into the design Thanks in advance.