According to Apple, its App Nap advanced technology feature in Mavericks helps you save power when you’re working with more than one app at a time. The system knows when a certain app is in the background, completely hidden by other apps’ windows. When that app isn’t doing anything, then, OS X will slow the app down, keeping it from using up CPU cycles, and thus battery power.

It’s a great feature, and one of the reasons why your Macbook may seem to have more battery life than it used to, thanks to Mavericks.

When switching to a napping app, it can seem to take a couple of seconds for OS X to get that app back up to speed. If you want to reduce the start up time of a napped app, you can disable App Nap for it.

OS X Mavericks has been designed to optimize your Mac. Whether it’s an older Mac or a new one, a desktop or a laptop: Mavericks just makes everything work better.

One feature that helps in the effort to keep your battery from running out as fast as it could is App Nap, a way for your Macbook to put the apps that aren’t being actively used on a low-energy mode, which consumes less power, and helps your battery stay fuller, longer.

However, you can also turn this feature off for a specific app that you want to run at full power all the time.

Pixelmator, arguably the best image processing tool for Mac (and a steal at just $30) has today received its “most advanced” update yet. The version 3.0 “FX” release delivers lots of new features and improvements, including support for Apple’s latest OS X Mavericks upgrade and the new features that brings.