At the moment I have 1 250GB partition on my mac (Macintosh HD).
What I want to do is split my hard drive into 3 partitions. This is because I want to dual boot with Windows 8.1 and make a reserve drive for when El Capitan comes out so I can test it without my computer becoming buggy. The only issue is I can only split my Mac into 2 partitions. How would I do this? I also tried doing this in recovery mode and it did not work. Would I have to use a 3rd party tool like GParted? If so would it be safe and would I loose my recovery partitions if I do?