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If your Mac blocks a Terminal command paste or script

macOS Sequoia adds a security feature that blocks pasting risky Terminal commands. Users can bypass it via Edit > Paste or disable it in System Settings under Privacy & Security.

Background

- Apple's Gatekeeper and malware-removal tools (XProtect, Notarization) can block pasting Terminal commands or running downloaded scripts that look suspicious — users see messages like "Terminal pasting is blocked" or "script is from an unidentified developer." - This is part of macOS security that grew stricter after the 2021 "sudo" vulnerability and broader supply-chain attacks; Apple now scans clipboard content for obfuscated commands or known malicious patterns. - If you're a developer or power user and get blocked, you can approve the script in System Settings > Privacy & Security, or paste with Cmd+Shift+V (plain-text paste) to avoid triggering the heuristic blocker. - The article is Apple's official support document (not a news story) — it tells you how to unblock a legitimate script you trust, not how to disable security entirely.

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