OS X Mavericks (version 10.9) is the tenth major release of Mac OS X (now named macOS), Apple’s desktop and server operating system for Macintosh computers. OSX Mavericks is an impressive operating system which has come up with lots of new features and updates.
Here is download link for macOS Sierra 10.12 ISO Installer on Google Drive. It was downloaded from Apple Store then converted to ISO. It's meant for educational purposes only. For the strongest security and latest features, find out whether you can upgrade to macOS Mojave, the latest version of the Mac operating system. If you still need macOS Sierra, use this App Store link: Get macOS Sierra. To download it, your Mac must be using macOS High Sierra or earlier.
With OSX Mavericks you can now take the whole world on your desktop. You can easily look up for different directions and then finally send them to iPhone for recognition of your voice. You can get local points of interests like photos, restaurants with phone numbers etc. OS X El Capitan (version 10.11) is the twelfth major release of OS X (now named macOS), Apple Inc.’s desktop and server operating system for Macintosh computers.
It is the successor to OS X Yosemite and focuses mainly on performance, stability, and security. Following the Northern California landmark-based naming scheme introduced with OS X Mavericks, El Capitan was named after a rock formation in Yosemite National Park, signifying its goal to be a refined version of Yosemite. El Capitan is the final version to be released under the name OS X; its successor, Sierra, was announced as macOS Sierra.
MacOS Sierra (version 10.12) is the thirteenth major release of macOS (previously OS X), Apple Inc’s desktop and server operating system for Macintosh computers. The successor to OS X El Capitan, it is the first version of the operating system issued under the June 2016 rebranding as macOS. Sierra is named after California’s Sierra Nevada mountain range. The mountain in the default desktop picture is Lone Pine Peak. Its major new features concern Continuity, iCloud, and windowing, as well as support for Apple Pay and Siri.