When comparing Windows 8.1 vs OS X Mavericks, the Slant community recommends OS X Mavericks for most people. In the question“What is the best laptop OS?” OS X Mavericks is ranked 59th while Windows 8.1 is ranked 61st. The most important reason people chose OS X Mavericks is:
There are many features that improve battery life, such as App Nap.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Hardware Compatibility
Windows has excellent x86-based compatibility, and has recently announced ARM compatibility as well.
Pro Familiar Windows Interface
As opposed to unfamiliar and purpose-built Linux distros, Windows still reigns supreme for sheer usability and ease of use.
Pro Customizable UI
There are many that can be used to customize the MetroTile screen and add custom tiles. Then, by adding custom tiles you can configure them to open any application or web page that you need. For example: Netflix, HBOGo or Steam.
Pro Battery optimization
There are many features that improve battery life, such as App Nap.
Pro Great if you don't like El Capitan and up.
Relatively fast and retains many design decisions of the OS X of old.
Pro Memory compression features
You can have a lot of things running yet have plenty of memory left.
Pro Free if you have Snow leopard or Lion
Pro Very tweakable
There are many things you can still change through the terminal.
Pro Still supported so far
Cons
Con Expensive
You will need to purchase a Windows license.
Con Resource Intensive
In contrast to many dedicated solutions which can run on nearly anything, running a full Windows install requires decent hardware. This is not a lightweight solution.
Con Outdated OS version
No longer supported by Apple (neither bugfixes or security fixes). The last release was in 2014.
Con Slower compared to previous versions
Con Very hard to find
Apple is very keen to only show the latest version.