I installed Mavericks as a partition on my 2011 Macbook Pro to see how it ran. So far so good and all original files under Snow Leopard have been saved to my external hard drive. I now want to remove the original partition (start-up disk?) to free-up hard drive space for Mavericks. I will not use 10.6.8 again. Disk Utility does not permit removal of the 'start-up disk'. Is there any work-around to save me re-installing Mavericks from scratch? Thanks.