I have read of an 'Ambient Board,' a 'Media Bay Sensor,' and an 'Air Deflector Sensor.' These all seem to be very small PC boards with on-board thermal sensors plus circuitry.

either a bad sensor or bad circuitry interfacing with a sensor. New 3.6V lithium battery, PMU reset, PRAM reset with no improvement. Then there is either a black screen, a grey screen with no Apple, or a grey screen with an Apple but no spinning gear. The thing is, *the chime is always present* on any attempt at restart or re-boot. But if run for a while (say 10 - 15 minutes or longer), it will not restart, or boot from a shutdown again, until it is off for an hour or more. There are no errors or error messages when the computer is running. My G5 always boots when cold (say 1 hour or more since last boot), and will run properly all day. We previously shared a list of Macs compatible with the update.I downloaded the Service Manual for the G5 Macs, and in the troubleshooting section under the 'no-startup' section, the only symptoms shown are ones where the chime isĪbsent. MacOS Sonoma is set to be released today following over three months of beta testing, with key new features including interactive desktop widgets, a Game Mode, the ability to add websites to the Dock as web apps, several Safari improvements, and more. 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. The feature does this by monitoring your battery's temperature history and its charging patterns.īased on the measurements that it collects, battery health management may temporarily reduce your battery's maximum charge.

In a support document, Apple explains how the battery health management feature works:īattery health management is designed to improve your battery's lifespan by reducing the rate at which it chemically ages. Battery health information can be found by opening the System Settings app and clicking on Battery. 'Battery health management updated on 13-inch MacBook Air with M2 chip to better optimize long term battery health,' the release notes state.Īpple does not provide any additional details about the exact optimizations that it made, nor have there been any widespread battery health complaints from customers who own this 13-inch MacBook Air model, released in July 2022. MacOS Sonoma better optimizes the long-term battery health of the 13-inch MacBook Air with the M2 chip, according to Apple's release notes for the software update.

For apple instal Deflector