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 ...

A back end change to the Mac App Store appears to have shut out users of macOS Sierra and older versions, blocking not just purchases, but also downloads of software already bought. While users of 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 ...