If they ever release a new iMac I plan on selling my old MacBook. I have a few questions about the whole process. I have never messed with time machine but from what I hear it is a complete backup. I think I should be able to run time machine and it will create a backup file. I will save that file to an external drive and when I get the new iMac I will run time machine and load up the backup file from the external drive and it will be ready to go? EDIT ANSWER FOUND: Looks like I can just use migration assistant and directly connect the two computers using an Ethernet/Firewire/Thunderbolt cord. Here is the link for others: http://support.apple.com/kb/HT4413 Once I have the copy complete I would like to completely erase my drive and write 0s if possible. What is the best software for this for mac? Once that is done I need to install mountain lion without a disc on to this wiped MacBook computer. I have purchased it under my app store but how will I access it to load it? Will I need to create a boot cd/flashdrive? Sorry about all the questions and thanks for the help.