Is your Mac up to date with the latest version of the Mac operating system? Is it using the version required by a product you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, learn which version is installed now.

If your macOS isn't up to date, you may be able to update to a later version.

Saying goodbye to a good friend. This is my GGJ18 submission for the theme of 'Transmission'. To play use a controller (tested with Xbox 360 controller only).

Which macOS version is installed?

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From the Apple menu  in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.

What is the latest macOS version?

These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Big Sur. As updates that change the macOS version number become available, this article will be updated to show the latest version of that macOS.

If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar and Photos.

Maria Paola Puggioni (Research Scholar)

Noelia Pastor Cantizano (Postdoctoral Researcher)

Kaylie Barton (Undergraduate Research Assistant)

Elizabeth Selby (Research Assistant)

Trent Garner (Research Assistant)

Luciana Renna (Postdoctoral Researcher)

Poyner Heather (Research Assistant)

Yunting Pu (Postdoctoral Researcher)

Torél Beard (Research Assistant)

Giovanni Stefano (Research Assistant Professor - fixed term)

Junling Luo (Visiting Scholar)

Melissa Borrusch (Research Assistant)

Anne C. Rea (Postdoctoral Researcher)

Kayla Clouse (Research Assistant)

Elizabeth Rose Brooks (Research Assistant)

Justin Scholten (Undergraduate Research Assistant)

Emilia Emerson (Undergraduate Research Assistant)

Rebecca Selby (Research Assistant)

Tessa R. Clark (Research Assistant)

Yashiuan Lai (Graduate Student)

Goodbye (z's Laboratories) Mac Os 11

Michael A. LaDuke (Undergraduate Research Assistant)

Jenia Schlegel (Visiting Graduate Student)

Cristina C. Ruberti (Postdoctoral Researcher)

Katherine McCullen (Research Assistant)

Sam Vaitkevicius (Research Assistant)

Courtney Steger (Undergraduate Research Assistant)

Alex Rainey (Undergraduate Research Assistant)

Jessie Gamble (Undergraduate Research Assistant)

Mikael Nefcy (Undergraduate Research Assistant)

Joe Riedy (Research Assistant)

Giulia Russo (Postdoctoral Researcher)

Goodbye (z's Laboratories) Mac Os X

Alexis Lockett (Undergraduate Research Assistant)

Zhe Meng (Visiting Scholar)

Tao Jiang (Visiting Scholar)

Jack Yasema (Undergraduate Research Assistant)

Matt Lipphardt (Undergraduate Research Assistant)

Sha Tao (Undergraduate Research Assistant)

Clarissa Wormsbaecher (Undergraduate Research Assistant)

Taylor Bluhm (Undergraduate Research Assistant)

Alan Sulpizio (Undergraduate Research Assistant)

Junwei Liu (Postdoctoral Researcher)

Verena Betzler (Visiting Graduate Student)

Natalie Harnsakunatai (Undergraduate Research Assistant)

Chris Blazy (Undergraduate Research Assistant)

Nicole Mannino (Undergraduate Research Assistant)

Melissa Gray (Undergraduate Research Assistant)

Yani Chen (Graduate Student)