Following the release of iOS 13.5 developer beta 4 yesterday, Apple today has released the fourth developer beta macOS Catalina 10.15.5 as well. The new update is rolling out now via System Preferences.

The biggest change in macOS 10.15.5 is a new Battery Health Management feature. The goal of the change is to reduce the chemical aging of a MacBook’s battery and extend its lifespan, but without comprising battery life.

Here’s how Apple describes the feature, which was introduced in macOS 10.15.5 beta 2:

Other than this change, macOS 10.15.5 focuses on bug fixes and performance improvements. The update is available now through the System Preferences application for developers. We expect a public beta release soon as well.

Based on the measurements that it collects, battery health management may reduce your battery’s maximum charge when in this mode. This happens as needed to ensure that your battery charges to a level that’s optimized for your usage—reducing wear on the battery, and slowing its chemical aging.

Read more: 

  • Here’s how to control the new Battery Health Management feature in macOS Catalina
  • Apple releases second beta of macOS 10.15.5 with new Battery Health Management feature
  • Apple releases macOS 10.15.4 supplemental update with FaceTime and USB-C fixes, more