Hey guys, I'm new to this forum--I really need some help. I have a Macbook pro late 2011 model that came with a 500GB hard drive and 4GB of RAM. My computer was getting pretty slow after about a year and a half, so I decided to purchase 8GB of RAM and the 256GB Samsung 840 Pro SSD to speed up my system. The RAM wasn't a problem, but I've had nothing but problems installing the Samsung SSD. First it wasn't recognized by my mac, then I realized I had to format it, but it wouldn't format because it was locked. I eventually had to format it on a windows computer and then reformat it using a mac. To make a long story short, I eventually got Mountain Lion installed on my SSD by connecting it to a usb and doing the whole process externally rather than having it done on the inside of my MBP. It works great when I boot up into OS X from the USB (I'm actually using it right now and it's great), but it will not boot up when I try to hook up the SSD to the eSATA connector on the inside of my mac. Does anybody know how to fix this? I don't want to have to boot up from the USB every time I use my mac. I tried to update the firmware on the drive, but it's Windows only... I'm a little lost :/