Where are updated Apple security guidelines for recent OS X versions? [duplicate]

1. Where can you find updates for Apple operating systems?
2. How long does Apple provide security updates for macOS?
3. What is the most recent Mac OS update?
4. How can I tell when my Mac was last updated?
5. Can a Mac be too old to update?
6. How do I update my Mac when it says no updates available?
7. Does Apple Support old OS?
8. What versions of macOS are still supported by Apple?
9. Does Apple still support Yosemite?
10. Is my iPad too old to update?
11. Will iPhone 7 Get iOS 15?
12. Will there ever be a Mac OS 11?

Where can you find updates for Apple operating systems?

Choose System Preferences from the Apple menu , then click Software Update to check for updates. If any updates are available, click the Update Now button to install them. Or click “More info” to see details about each update and select specific updates to install.

How long does Apple provide security updates for macOS?

So, assuming Apple releases a new version of macOS every year, each release of macOS will be supported with security updates for roughly three years.

What is the most recent Mac OS update?

The latest version of macOS is 11.4. Learn how to update the software on your Mac and how to allow important background updates. The latest version of tvOS is 14.6. Learn how to update the software on your Apple TV.

How can I tell when my Mac was last updated?

How to Check What Software Updates Have Been Installed with System Preferences

1. Open “System Preferences” from the  Apple menu.
2. Click on “Software Update” control panel.
3. Choose the “Installed Software” tab to see the list of installed updates.

Can a Mac be too old to update?

Apple said that would run happily on a late 2009 or later MacBook or iMac, or a 2010 or later MacBook Air, MacBook Pro, Mac mini or Mac Pro. If you Mac is supported read: How to update to Big Sur. This means that if your Mac is older than 2012 it won't officially be able to run Catalina or Mojave.

How do I update my Mac when it says no updates available?

Go to System Preferences and select the app store, turn on Automatically check for updates and checkmark ON all the options. This includes download, install app updates, install macOS updates, and install system.

Does Apple Support old OS?

The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier. If a macOS can't be used on your Mac, the App Store or installer will let you know.

What versions of macOS are still supported by Apple?

Releases

Does Apple still support Yosemite?

Upgrading prematurely may result in a potential loss of data and performance as a result of incompatible applications. ... As a result, we are phasing out software support for all computers running macOS 10.10 Yosemite and will end support on December 31, 2019.

Is my iPad too old to update?

Yup. Your iPad is too old. A 2011, 2nd gen iPad cannot be upgraded beyond iOS 9.3.

Will iPhone 7 Get iOS 15?

Apple didn't only announce iOS 15 and iPadOS 15.
...
Devices that will support iOS 15, iPadOS 15.

Will there ever be a Mac OS 11?

Yes, there will be, and it is NOW! On 22nd June, 2020, Apple unveiled it's new macOS, the macOS “Big Sur” (macOS 11.0). The new macOS has the whole desktop changed, with the menu bar supporting iOS-like features, and the whole dock has a new structure.