Apple releases MacBook Pro Supplemental Update for 15-inch MacBook Pros

Apple has released an updated version of macOS Mojave 10.14.5 for 2018 and 2019 for MacBook Pro models (15-inch) that feature a T2 security chip. It can be downloaded via  the "Software Update" section of System Preferences on the laptops.

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Apple release notes say “the MacBook Pro Supplemental Update addresses a firmware issue affecting 15-inch MacBook Pro computers with T2 Security Chip, and is recommended for all users.”