I know I probably made a mistake, so I dont need to be reminded, but I am in a jam. I bought a late 2013 retina macbook pro from ebay, and it came with some preinstalled software. I want to install some of my own software, but I have no administrator privileges, I dont have the password, I have looked this up, and I am totally locked out of the machine, I can get to the desktop, but I cannot customize or make any changes. I tried to email the seller about the password, and so far no reply. So I have decided to do a clean install of maveriks on the machine. I thought I would make a bootable thumb drive to save the long download time of the os, I have a very slow internet connection. I looked up some youtube videos of this, followed the instructions and made an installer on the thumb drive using the creatmedia method. I then plug the drive into the laptop, press and hold the power and option keys, until I get a screen showing install maveriks, and untitled hard drive. I select install maveriks, the screen then just goes grey with a circle with a bar through it and then the machine shuts down. I then remove the thumb drive, and try powering up the machine holding the option and power keys, all I get is a hard drive icon image, I am not presented with other options, like internet recovery. I then power down and power up holding command and r keys, this brings internet recovery, and am prompted for my wifi network name and password, I type these in and it is now stuck trying to find a network.