Transfer Your OS X to the SSD
If your SSD is up and running properly, there's only one step left before you get to experience those blazing-fast boot times everyone's talking about. Download Carbon Copy Cloner if you haven't already and start it up. Set your source disk to your current boot volume (most likely named Macintosh HD) and set your target disk to your new SSD.
Generally, since SSDs are small and expensive, the way this works is that you store your operating system on the SSD for fast boots and application launches, while storing the rest of your data (such as documents, movies and music) on your second, magnetic drive. So, under Source Disk, you'll want to scroll down and uncheck the box for your home folder (and any other home folders on your system, if you have multiple users) to exclude it from the cloning process. Hit the clone button and wait for it to finish. Once it does, go ahead and restart your computer, holding the option key at startup so you can select your SSD as the boot volume. Your OS will be up and running in record time.
Once you've wiped the drool from your face (I'm not going to lie, I restarted it three times just to watch it boot that quickly), you'll notice a lot of your settings are missing in your apps. This is because a lot of those preferences are stored in your home folder, which we didn't copy over. To fix this, head into System preferences and open up the Accounts pane. Click the lock in the bottom left corner and type in your password to make changes, and then right click on your user account. Click Advanced Options and look for the "Home Directory" box on the pane that pops up. Simply hit the "Choose" button and navigate to the home folder on your old drive. Log out and then log back in.
If you did everything correctly, you should see your preferences restored (except for a few things, like your wallpaper, which you'll need to re-add). Do this for each user account on your computer. You can now go into your old drive and delete all the folders on it except for "Users". This will not only free up the rest of the space on that drive, but make the drive unbootable, so your computer will default to your new SSD when booting. You don't need to do anything else differently—saving files to your "Documents" or "Downloads" folder will automatically store them on your second drive, since you relocated your home folder.
