What is the Difference Between OS X Mavericks and OS X Yosemite?

OS X Mavericks and OS X Yosemite are two versions of Apple's operating system for Macintosh computers. While both offer a range of features and improvements over previous versions, there are some key differences between the two:

OS X Mavericks (version 10.9):

Released in 2013, it introduced several new features and enhancements to the Mac operating system.
Significant improvements were made to power efficiency, allowing for longer battery life on laptops.
Finder received multiple enhancements, such as file tags and tabs for better organization and productivity.
Safari 7 was included, with enhanced performance and new features like Reading List and Shared Links.

OS X Yosemite (version 10.10):

Released in 2014, it marked a significant change in the interface, with a simpler, flatter look similar to iOS 7.
The default font changed from Lucida Grande to Helvetica Neue, providing a more modern and consistent appearance across Apple devices.
Apps were redesigned to be more streamlined, with many toolbars being simplified to save space, especially beneficial for laptops with smaller screens.
Notifications were redrawn, and the "Today" section provided a full summary of daily updates, making the interface more integrated with iOS.

In terms of performance, there were some differences between the two operating systems. A speed test comparison showed that while Yosemite consistently produced slower performance compared to Mavericks, the difference was small, ranging from slightly under 1% to 5%. Overall, upgrading from Mavericks to Yosemite provided a more modern and familiar interface, better integration with iOS, and other enhancements while maintaining a similar level of performance.