Apple today seeded the fourth beta of an upcoming macOS Catalina 10.15.5 update to developers for testing purposes, one week after seeding the third beta and over a month after releasing macOS Catalina 10.15.4 with Screen Time Communication Limits, iCloud Folder Sharing, and real-time Apple Music lyrics.

macos catalina wallpaper
The new macOS Catalina beta can be downloaded from the Software Update mechanism in System Preferences after installing the proper software from the Developer Center.

macOS Catalina 10.15.5 introduces a new Battery Health Management feature for Mac notebooks, which is designed to extend the overall lifespan of a Mac's battery by reducing the rate of chemical aging.

The Battery Health Management feature analyzes the battery health of a laptop and its charging pattern, and in some cases, will preserve battery longevity and health by not charging a MacBook to its full capacity, which can reduce battery life.

When a Mac is used plugged in and the battery is largely kept full, Battery Health Management will kick in and will stop short of a full charge. The feature can be enabled and disabled in the Energy Saver section of the System Preferences app.

Related Forum: macOS Catalina

Top Rated Comments

allpar Avatar
allpar
76 months ago
But does it fix the crash-on-sleep for computers with T2 chips? And will there be a Mojave fix for those same computers?
Score: 14 Votes (Like | Disagree)
jayducharme Avatar
jayducharme
76 months ago
I'm hoping they've straightened out the numerous eGPU quirks. ?
Score: 8 Votes (Like | Disagree)
petvas Avatar
petvas
76 months ago
Well, even with Steve Jobs we had buggy macOS releases. This has nothing to do with the current leadership, but is a bigger problem that has grown the last years inside Apple.
I hope actually that there will be no major release anymore. Why not just announce what is coming in the next two years and roll it out slowly, feature by feature? I think that this is a much better approach to OS development and would give Apple time to make its OS more stable. I don't want a new OS version each year. I don't need a new OS each year, actually I am happy with what we have now.
Score: 7 Votes (Like | Disagree)
ThunderSkunk Avatar
ThunderSkunk
76 months ago
I wish that, since they’re not going to fix Catalina, that Apple would hold a bake sale to raise enough money to afford to hire a few high school kids to wedge the MBP16” graphics drivers into a mojave update. So all the people who blew $4000 on a notebook, in 2020 mind you, and got what is easily the least reliable and least useful computer I’ve ever owned, would have SOME way of getting some work done on this otherwise very beautiful thing, instead of just taking a massive bath on what would justifiably be the last major Apple purchase one could be expected to make.

i am hanging on to this thing while it sits awaiting an operating system. For a little while longer.
But srsly Apple, get it together.
Score: 6 Votes (Like | Disagree)
Babygotfont Avatar
Babygotfont
76 months ago
I'm finally stable across my eco-system (2017 iMac, 2012 MBPr, 2012 MM, Apple Watch Series 3, HomePod(2), HomeBridge Applications (not apples, but I have a lot of HomeKit connected devices via Homebridge), iPhoneX, iPad Pro 10.5 ... I struggled for 1 year getting all sorts of issues figured out / diagnosed ...

I've disabled auto-update on all my devices ... my next update will be on 10.16.XXXXXX when WWDC releases 10.17 beta

I do not trust apples software QA/QC anymore
Score: 5 Votes (Like | Disagree)
MrGimper Avatar
MrGimper
76 months ago

Personally, I think this whole year has been a public beta test for the upcoming 10.16.
10.16 "Wuhan" :cool:
Score: 4 Votes (Like | Disagree)
Read All Comments

Popular Stories

Apple Announces Special Event in New York Feature

Apple Announces Special Event in New York, London, and Shanghai on March 4

Monday February 16, 2026 6:05 am PST by
Apple today announced a "special Apple Experience" in New York, London, and Shanghai, taking place on March 4, 2026 at 9:00am ET. Apple invited select members of the media to the event in three major cities around the world. It is simply described as a "special Apple Experience," and there is no further information about what it may entail. The invitation features a 3D Apple logo design...
Read Full Article • 191 comments
iphone 16 apple intelligence

Apple Aiming to Release 'Breakthrough' New iPhone Accessory

Wednesday February 18, 2026 12:43 pm PST by
Apple is looking for a "breakthrough" with its push into wearable AI devices, including an "AirTag-sized pendant," according to Bloomberg's Mark Gurman. In a report this week, he said the pendant is reminiscent of the failed Humane AI Pin, but it would be an iPhone accessory rather than a standalone product. The pendant would feature an "always-on" camera and a microphone for Siri voice...
Read Full Article
CarPlay Liquid Glass Dark

iOS 26.4's New CarPlay Video Feature Shown in Action

Wednesday February 18, 2026 9:29 am PST by
Back at WWDC 2025, Apple revealed that it was planning to allow CarPlay users to watch video via AirPlay in their vehicles while they are not driving, and the first beta of iOS 26.4 suggests the feature may be nearing availability. There are several new references to CarPlay video streaming functionality within the iOS 26.4 beta's source code. The feature is not yet visible to users, but...
Read Full Article • 57 comments
iphone 17 pro green

iPhone 17 Pro Max Curiously Becomes Most Traded-In Smartphone

Wednesday February 18, 2026 9:13 am PST by
New trade-in data indicates that Apple's iPhone 17 Pro Max has rapidly become the single most traded-in smartphone. According to a new report from SellCell, Apple's latest flagship iPhone has quickly risen to the top of the independent trade-in market, accounting for 11.5% of all devices appearing in the top-20 trade-in rankings just months after release. The analysis is based on SellCell...
Read Full Article • 205 comments
Apple Announces Special Event in New York Feature 1

Apple Event on March 4: Here's What to Expect

Tuesday February 17, 2026 8:08 am PST by
Apple on Monday invited selected journalists and content creators to a "special Apple Experience" on Wednesday, March 4 in New York, London, and Shanghai. At an Apple Experience, attendees are typically given the opportunity to try out Apple's latest hardware or software. Following the launch of Apple Creator Studio last month, for example, some content creators attended an Apple Experience...
Read Full Article • 59 comments