Now you have two working SSDs in your MacBook Pro. You are currently in either one of two situations:
- [My Situation] One of the SSDs has already been loaded up with OS X and the other is empty.
- Both SSDs are new and empty. There is no OS loaded on either.
If you are in situation #2, I am guessing (not tried it personally) that you need to:
- Put your OS X disc into the SuperDrive you placed into the provided external enclosure and connect it to your MacBook Pro
- Hold down C and boot into the installer
- Close the installer window and go to the top menu to open up Disk Utility
- Create the RAID array and proceed installing OS X onto it
However, I have heard of some issues where the computer will not see the RAID array when you are booted off of the OS X install disc. You might need to create the array while booted off of another external OS X install or on a working OS X install already present on one of the SSDs — that’s why I recommend having an external hard drive lying around just in case. To clarify, it seems if you have the computer booted off of OS X on another drive, insert the install disc, run the initial setup from the inside-OS X installer that auto-reboots for you, that it should work.. if that makes sense. If not, leave a comment.
If you are in situation #1 like myself, then things are a bit trickier. In a nutshell, I cloned my OS X installation onto an external USB 2.0 hard drive, changed the startup disk to that external drive then booted from it, created the RAID array, cloned the external drive onto the new RAID array, changed the startup disk to the RAID array and rebooted.
While you can do the drive cloning back and forth like I describe below I always recommend doing a fresh OS X install whenever possible.