I have a white 2009 uni-body MacBook that I do graphic design work on. Once a month, I meet with my client in the city. Would there be any issue swapping hard drives back-and-fourth on my machine. I would use my 500GB drive with all my apps installed, etc. 99% of the time but when I had to take my laptop out of the office I would swap the drive to a 250GB drive that just has an install of OS X (no apps). Would this cause any issues with the firmware by doing this?