On my mac I have two partitions, and I want to create a new one. One partition has Mountain Lion and the other has Windows 7 (through Boot-Camp). I want to create a new mac partition, and for that I want to remove about 10Gb of space from the mac partition I already have and use that space for the new one.
I have searched quite a bit and I found so many different answers I can't really make up a plan on my mind, so I decided to post a question here explaining my situation in hopes of getting an answer tailored to my needs.
I know that resizing windows partitions can lead to big problems, but the thing is I don't want to resize the windows partition, just the mac partition. Does that still cause problems? If so, what would you advise (preferably something you have already tried)?
Lastly, I found out about GParted, which is recommended on various places, but I'm at a loss on how to use it (for example, how can I put it on my USB pen?).