how can i update to macOS Catalina 15612.4.9.1.8 when my computer does not bring up this update when requested via software update.

Weefrustrated wrote:

How can i update to macOS Catalina 15612.4.9.1.8 when my computer does not bring up this update when requested via software update?

You do not say what year iMac...? there are hardware limitations

Big Sur Tech specs

• MacBook (2015 or later)

• MacBook Air (2013 or later)

• MacBook Pro (Late 2013 or later)

• Mac mini (2014 or later)

• iMac (2014 or later)

• iMac Pro (2017 or later)

compare your Catalina Technical Specifications - Apple Support

https://support.apple.com/kb/SP803?locale=en_US

System requirements macOS 10.15 Catalina

macOS Catalina will run on all Macintosh computers that supported Mojave:

MacBook: Early 2015 or newer

MacBook Air: Mid 2012 or newer

MacBook Pro: Mid 2012 or newer

Mac Mini: Late 2012 or newer

iMac: Late 2012 or newer

iMac Pro

Mac Pro: Late 2013 or newer; Mid 2010 or Mid 2012 if upgraded with a recommended Metal-capable GPU

• Mac Pro (2013 or later)

The older macOS installer backups on this server:

https://support.apple.com/en-us/HT211683

verify you are using the Safari browser to download/initiate the macOS links.

Weefrustrated wrote:

How do I update Safari from Version 15.2 (15612.3.6.1.8, 15612) to Version 15.2 {15612.4.9.1.8}?

Continuous spinning wheel "Checking for updates"

I let it spin for an hour with no updates offered.

iMac late 2015 running macOS Catalina 10.15.7 with Safari running version 15.2 (15612.3.6.1.8, 15612)

Automatic update preference is checked.

Forget the spinning wheel— close the System Preferences.

From your Spotlight search open the Terminal.app as suggested above— copy and paste:

softwareupdate -l

use the enter/return key to proceed...

if it does not return your Safari in question then it is not for you.

Did you upgrade to 10.15.7 combo first?

Apple menu -> About This Mac -> Software Update

Does anything appear after running this command in Terminal? Without Quotation Marks " softwareupdate -l " (list all available updates)