MacBook Pro firmware update fixes T2 security chip problem

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The Apple T2 chip could be the source of mysterious crashes afflicting two of Apple's newest computers.
A new version of the macOS 10.14.4 just for last year’s 15-inch MacBook Pro is for the T2 co-processor.
Photo: IFIXIT

Users of recent 15-inch MacBook Pro models need to install an updated version of macOS that was just released this morning. Details are scanty, but Apple says this fixes an unspecified firmware issue related to the T2 security chip.

Apple confirms T2 chip will block certain third-party repairs

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The Apple T2 chip could be the source of mysterious crashes afflicting two of Apple's newest computers.
The T2 chip is great. Unless you want to use a third party repairer.
Photo: IFIXIT

Apple has confirmed that certain repairs for its new Macs, sporting the T2 chip, can only be carried out by officially sanctioned Apple repair shops.

That’s because it contains software locks which brick the computers if they’re not operated on by someone not using Apple’s proprietary diagnostic software, called the AST 2 System Configuration. iFixit CEO Kyle Wiens describes this as a “guillotine that [Apple is] holding over” product owners — and potentially third party, unauthorized repairers, too.