Reprinted from TidBITS by permission; reuse governed by Creative Commons license BY-NC-ND 3.0. TidBITS has offered years of thoughtful commentary on Apple and Internet topics. For free email subscriptions and access to the entire TidBITS archive, visit http://www.tidbits.com/ Apple Ships Mysterious macOS 11.5.2 Update Josh Centers Apple has released macOS Big Sur 11.5.2. The release notes mention only 'bug fixes.' There are no security notes. What does it fix? We don't know! Should you install it sooner or later? We have no idea! If you install it, let us know in the comments if you notice any difference at all. Two things that aren't mysterious: the macOS 11.5.1 Big Sur update weighs in at 2.54 GB for a 2020 27-inch iMac, and you can install it in System Preferences > Software Update. References Visible links Hidden links: 1. https://tidbits.com/wp/../uploads/2021/08/macOS-11.5.2-update.png .