Obviously we saw Mavericks first demonstrated a few months ago and since then there have been several beta versions made available to developers and just a few weeks ago the gold master version was also released.
There are over 200 new features and enhancements in Mavericks including some optimisation methods built in to maximise battery life and and memory compression to make best use of the available RAM.
As mentioned before, OS X Mavericks will be FREE and available on almost every Mac!
In OS X Mavericks, Timer Coalescing groups low-level operations together, creating tiny periods of idle time that allow your CPU to enter a low-power state more often. With its activity reduced up to 72 percent, the CPU uses less energy, giving your battery a break, too. This happens so fast you won’t notice a thing. And your Mac still gets just as much done just as quickly.
App Nap helps you save power when you’re working with multiple apps at the same time. OS X can tell when an app is completely hidden behind other windows. And if that app isn’t currently doing something for you — playing music, downloading a file, or checking email, for example — App Nap conserves valuable battery life by slowing the app down. But as soon as you start to use it again, the app instantly shifts back to full speed. It’s so seamless you’ll think it had been running that way all along. App Nap works the same way with Safari tabs, so only the visible tab is running at full speed. With App Nap, CPU energy use can be reduced by up to 23 percent.
The more memory your Mac has at its disposal, the faster it works. But when you have multiple apps running, your Mac uses more memory. With OS X Mavericks, Compressed Memory allows your Mac to free up memory space when you need it most. As your Mac approaches maximum memory capacity, OS X automatically compresses data from inactive apps, making more memory available.