Apple's Unix-based operating system. Use for questions about the operating system or to provide OS context. For Mac hardware questions, use [mac]. Questions about using macOS on non-Apple hardware ("Hackintosh"), are off-topic.

About macOS

macOS is a Unix-based operating system created and sold by Apple Inc. for their Macintosh computers. It first debuted in 1999 with Mac OS X Server 1.0. It is based off of NeXTSTEP, NeXT's operating system, which in turn is based off of the Mach kernel. The X in OS X is the Roman numeral for ten and such, pronounced as ten and not as a normal "x".

Apple rebranded OS X as macOS with the release of 10.12 (Sierra) in June 2016.

How to use the tag

  • This tag is for any and all questions related to OS X. Questions about the hardware should be tagged instead.

  • It is against the Mac OS X EULA to install OS X on any non-Apple branded hardware ("Hackintosh"). Hackintosh questions are considered off-topic for Super User.

Related Tags

There are several related tags for designed to specify the version of OS X in use such as:

  • – macOS 10.13 (High Sierra), the latest public version, adding APFS as the default file system, and enhancements to Photos and Safari.

  • – macOS 10.12 (Sierra), adding Siri, universal clipboard, and enhancements to Messages and Photos.

  • – OS X 10.11 (El Capitan), adding split-screen view, System Integrity Protection, and support for the Metal graphics API.

  • – OS X 10.10 (Yosemite), adding Handoff, iPhone calls, SMS, Instant Hotspot, and a new dark theme.

  • – OS X 10.9 (Mavericks), adding iBooks and Maps, and focusing on power-users such as better multi-display support.

  • – OS X 10.8 (Mountain Lion), adding Notification Center, Reminders and Notes.

  • – OS X 10.7 (Lion), which included new features such as full disk encryption, Mission Control, Auto-resuming apps and additional support for multi-touch gestures.

  • – OS X 10.6 (Snow Leopard), an upgrade that primarily focused on speed and stability.

  • – OS X 10.5 (Leopard), which introduced many new features such as a redesigned Finder, the "Spaces" desktop management and the Time Machine backup utility.

  • – OS X 10.4 (Tiger), which introduced the Spotlight search, the Automator scripting tool and Dictionary.

  • – OS X 10.3 (Panther), which updated Finder and introduced Exposé, the File Vault encryption and the Safari browser.

  • – a specialized server version for OS X which used to be released along with the "normal" OS X versions. As of 10.7 Lion, OS X server additions can be installed as an application package through the Mac App Store.

Questions about OS X can also be asked on Ask Different, which is focused on Apple products.

macOS on Wikipedia.