Using SSD on Macbook
If you wish to use a third party SSD on your Macbook you have many options. The easiest and quickest way if to order your macbook with the preinstalled SSD from Apple. This is obviously the most expensive way.
You can also replace the internal hard drive with a third party SSD drive for example a very fast OCZ Vertex 2 but since your replacing a larger spinning drive with an SSD you will loose a lot of space but gain system boot and application load speed.
There is an alternative that gives you both speed and storage space. You can replace the DVD drive with a second drive. I know this sounds crazy to some people but think when was the last time you actually put a CD/DVD disk in your laptop.
If you install a third party SSD you will need to enable Trim using this application. This will help you extend the life and reliability of your drive.
https://cindori.com/trimenabler