macOS 26.4 warning about potentially malicious Terminal commands
By William Gallagher
Published on March 26, 2026.
Apple has added a warning to its Mac operating system, macOS 26.4, warning about potentially malicious Terminal commands. The warning appears when a user tries to paste an instruction that might be malware. However, it is not yet available in every installation of the software. It is unclear whether this warning will appear regardless of what the user is pasting into Terminal. The only person who has spotted this warning is X user Mr Macintosh.
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