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 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.