macOS Sierra (version 10.12) is the name of Apple’s desktop operating system, and was revealed at its annual Worldwide Developers Conference on June 13, 2016. After using the “OS X” moniker for the ...

Seems fine on my 2012 MBP w/ spinning rust. Comparing performance with an SSD system's on you, not the OS. It works acceptably for what it is - no worse than any prior OS running on the same spinning ...

I need to install Sierra on a Mac that doesn't have it yet. The links to the App Store are dead, can't install it from the purchases because Apple removed it, and can't do High Sierra because of Adobe ...