Feel free to contact me if you can help replace any of the '?' entries.Ī special 'thank you!' goes to Mr.

The '?' entry for Size on a given release indicates I was unable to find the size.

The largest (non-combo, non-main OS release) update was 10.15.1 at 5.3GB.

The smallest update was 10.3.1, at only 1.5MB.

(Tecnically, it's actually the 192 day interval between the Mac OS X Public Beta and version 10.0, but I'm counting from the official 10.0 release.)

The longest time period between any two minor releases is 165 days, which was how long we waited for the 10.4.9 update.

The shortest time period between any two releases is six days, which is how quickly the 10.15.5 Supplemental Update 1 came out after the 10.15.5 release.

So on average, we've seen some sort of update every 47.7 days.

As of March 31st, 2022 (12.3.1's release date), it's been 7,869 days since the Public Beta was released.

This version was only for the then-new PowerMac G5 and the flat panel iMac G4, and was never generally released. This figure includes the one odd macOS X release: 10.2.7.

Starting with the Public Beta and up through 12.3.1, there have been 165 macOS releases, both major and minor.

Some random notes, updated from the original post: This has happened a few times over the years. This is to keep the version numbers in the proper order, even when an older OS received an update after a major new release came out. Some entries may appear out of chronological order (i.e. Note: The Days column reflects the number of days between releases. Ⓘ Leopard - First universal binary release Ⓘ Snow Leopard - First Intel-only release If an error occurs while installing an update or upgrade, learn how to resolve installation issues.Ⓘ Lion - App Store only (USB stick later) If you downloaded any apps from the App Store, use the App Store to get updates for those apps. When Software Update says that your Mac is up to date, then macOS and all of the apps it installs are up to date, including Safari, Messages, Mail, Music, Photos, FaceTime, and Calendar. Software Update shows only upgrades that are compatible with your Mac.

Upgrade Now installs a major new version with a new name, such as macOS Monterey.

Update Now installs the latest updates for the currently installed version, such as an update from macOS Big Sur 11.5 to macOS Big Sur 11.6.

If your System Preferences doesn't include Software Update, learn how to upgrade to macOS Monterey or upgrade to an older macOS, and use the Updates tab of the App Store app to get app updates. In the System Preferences window, click Software Update.From the Apple menu  in the corner of your screen, choose System Preferences.Then follow these steps to find and install any available software updates or upgrades. Before you get started, it's a good idea to back up your Mac.

Find update history in mac