Over the years, Apple has introduced a number of screens which appear the first time you log into a Mac. Among those which appear following an upgrade to macOS Tahoe 26.0 is the Software Update Complete screen, which notifies you that the Mac has been upgraded to macOS Tahoe.

I have not found a way to suppress this screen using a defaults command, but it is possible to suppress the Software Update Complete screen on macOS Tahoe using a configuration profile. For more details, please see below the jump.

The relevant preference domain and key values are below:

• Preference domain: com.apple.SetupAssistant.managed
• Key: SkipSetupItems
• Value: UpdateCompleted

The profile is available on GitHub via the link below:

https://github.com/rtrouton/profiles/blob/main/SkipSoftwareUpdateCompleteSetup