macOS 26.4 Introduces New Security Feature for Terminal Commands
macOS Tahoe 26.4 introduces a new security feature that warns Mac users if they paste certain commands in the Terminal app that may be harmful.
For those unaware, the Terminal app allows you to enter text commands to perform tasks on your Mac. Terminal is primarily intended for advanced users and developers, but unfortunately casual users can be tricked into entering harmful commands that can permanently delete files, change user permissions, and cause other problems.
Here is what the warning says when it appears:
Possible malware, Paste blocked
Your Mac has not been harmed.
Scammers often encourage pasting text into Terminal to try and harm your Mac or compromise your privacy.
These instructions are commonly offered via websites, chat agents, apps, files, or a phone call.
There is a "Paste Anyway" option if you wish to proceed.
The warning was spotted by users across Reddit and X over the past week.
We have yet to determine exactly which commands trigger the warning, which does not always appear. For this reason, always be careful. If you are unfamiliar with how Terminal works, it is probably best to avoid using it entirely.
macOS 26.4 was released earlier this week.
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