Tackle stubborn disk partitioning in OS X If partitioning a drive with Disk Utility gives you unmount or resource busy errors, there may be workarounds you can use.

Apple has publicly touted a significant new feature in OS X 10.9 Mavericks designed to maximize RAM, storage and CPU use while also boosting power efficiency: Compressed Memory.

It notes: "Unlike most other UNIX versions, Mac OS X does not use a separate partition for the virtual memory swap file.

I'd like to allocate 256GB for data that can be read from/written to by both Mac OS X, and Windows. Each OS partition would have 128GB to themselves.

How to create a test partition for the OS X Yosemite beta What to do if you want to try the software without relying on a beta every day.