System Integrity Protection disabled by default on some Touch Bar MacBook Pros

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Some — but not all — Touch Bar models of the new MacBook Pro are shipping with System Integrity Protection disabled, potentially exposing them to malware threats, according to discussions on Twitter.

The issue was called out by developers Jonathan Wight and Steve Troughton-Smith. The latter suggested that there seems to be no obvious trend, other than Pros with a function key row having SIP on as usual.

While Macs do have other safeguards, SIP has been on by default since OS X El Capitan, and limits root permissions — mitigating the amount of damage malware can do if it does infect a system.

Apple is allegedly aware of the problem, and likely working on a software update. Technically confident Mac owners can turn SIP back on themselves holding down Command-R when booting, releasing when a progress bar appears, then selecting Terminal from the Utilities menu in recovery mode. Entering "csrutil enable" and restarting should complete the process.