I apologize in advance if this has been asking and answered before, but after a cursory search of the forums, I didn't see an answer to this particular question. I am new to the Mac world, and I am buying a MacBook Pro off of cragslist for a very nice price, but before I go through with it, I want to make sure I can make it work for me. The previous owner partitioned the HDD and installed Windows 7 which isn't a problem with me, but he made it so that almost the entire HDD was the Windows drive and uninstalled OSX. I want to repartition the HDD while keeping Windows 7 to about a 30 GB slice, and reinstall OSX. I looked into the GPARTED program which should help me change the partition amounts without reformatting. How difficult will this be? Do you have tips or advice that I could use? I am very new to the whole partitioning thing and am only decent with computers, but I follow directions well. Is this worth it or should I keep looking for a good deal on craigslist that doesn't involve as much work?