macOS Tahoe 26.4 stops bad commands from running in the Terminal app before they do. The feature is meant to stop the rising threat of ClickFix social engineering attacks. ClickFix is a complicated form of social engineering that was first seen in the wild in 2024.

It tricks people into copying and pasting harmful commands into their Terminal. When run, these commands usually download and install malware like the MacSync infostealer, which steals sensitive information like Keychain credentials, browser cookies, and cryptocurrency wallet information. There is a main "Don't Paste" button that lets users stop the action, as well as a secondary "Paste Anyway" button for legitimate administrative tasks. The protection focuses on the main part of pastejacking: the quick paste-and-execute sequence that attackers rely on.

Apple stops this attack chain before any damage is done by adding a required confirmation step at the time of paste. User testing shows that the warning only shows up once per Terminal session, not every time you paste, so experienced developers won't be bothered. The official macOS Tahoe 24.4 release notes from Apple didn't say anything about this Terminal security feature.

Instead, they talked about updates to developer tools and fixes for SwiftUI. The security community found TheFeature on its own after the release candidate build was made public. Not all users can use the new Terminal protection yet, but it should be available to everyone in the next few weeks. It's not clear if Apple will add a similar feature to iOS 7.0 or later.