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 is the Welcome to macOS Tahoe 26 screen, which provides a walkthrough of selected new features available in macOS Tahoe.

I have not found a way to suppress this screen using a defaults command, but it is possible to suppress the Welcome to macOS Tahoe 26 screen on macOS Tahoe 26.1.0 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: OSShowcase

The profile is available on GitHub via the link below:

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