Apple today seeded the fifth beta of an upcoming macOS Catalina 10.15.5 update to developers for testing purposes, two weeks after seeding the fourth 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.

The macOS Catalina 10.15.5 update also addresses an issue that caused large data transfers to RAID volumes to freeze up the Finder app. With the update, large data transfers will no longer cause Finder to become unresponsive.

After installing macOS Catalina 10.15.4, some Mac users began experiencing occasional system crashes, primarily caused by large file transfers. The new update should successfully fix the problem.

Related Forum: macOS Catalina

Top Rated Comments

bpeeps Avatar
73 months ago

Seriously, no release today?! Wow.

The software and released used to be good.They just keep finding more issues than not. Probably says something about their quality control. The #NewApple is such a disappointment.
Complains about Apple taking time to make sure the release is correct and also them not releasing it today. This is actually hilarious.?
Score: 8 Votes (Like | Disagree)
Apple TarHeel Avatar
73 months ago
They FINALLY FIXED the dock not disappearing after the Mac is restarted or Shut Down!
Score: 6 Votes (Like | Disagree)
kissmo Avatar
73 months ago

Wow, I was expecting a release today too! Hmmm, maybe they are going for some serious stability improvements?
Well putting probability and plausibility in perspective.

Plausibility: they prioritize iOS over Mac OS.
Probability: 50% they work on serious stability improvements. 50% they prioritize iOS over Mac OS.

:)

Whatever it is, I was hoping it comes today. I don't have big issues with Catalina but it's definitely a lesser OS than Mojave for me.
I pray they improve it and they take their time....
Score: 5 Votes (Like | Disagree)
BarrettF77 Avatar
73 months ago

Well putting probability and plausibility in perspective.

Plausibility: they prioritize iOS over Mac OS.
Probability: 50% they work on serious stability improvements. 50% they prioritize iOS over Mac OS.

:)

Whatever it is, I was hoping it comes today. I don't have big issues with Catalina but it's definitely a lesser OS than Mojave for me.
I pray they improve it and they take their time....
agreed. I’ll probably build a hackintosh given they don’t take the platform seriously as they used to. This MacBook will be my last as I’m tired of lackluster support and development. Surprising for my household having gone from Apple lovers to just this is the least offensive option.
Throw that in one of your keynotes mr cook. “Customers stay with us because we aren’t the worst option.”....
Score: 4 Votes (Like | Disagree)
kissmo Avatar
73 months ago
Ahhh common Apple! I was hoping for the final release today :(
I want that battery feature so bad because I am very hectic with the way I handle the battery on the MBP....
Score: 4 Votes (Like | Disagree)
xnsys Avatar
73 months ago
Not surprised it's not out yet - there's a lot that needs fixing and that will take time.
Score: 3 Votes (Like | Disagree)

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
iOS 26

Apple Seeds Second iOS 26.2 Release Candidate to Developers and Public Beta Testers

Monday December 8, 2025 10:18 am PST by
Apple today seeded the second release candidate version of iOS 26.2 to developers and public beta testers, with the software coming one week after Apple seeded the first RC. The release candidate represents the final version iOS 26.2 that will be provided to the public if no further bugs are found. Registered developers and public beta testers can download the betas from the Settings app on...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
Johny Srouji

Apple's Chipmaking Chief Johny Srouji Responds to Report About Him Potentially Leaving

Monday December 8, 2025 9:23 am PST by
Apple's chipmaking chief Johny Srouji has reportedly indicated that he plans to continue working for the company for the foreseeable future. "I love my team, and I love my job at Apple, and I don't plan on leaving anytime soon," said Srouji, in a memo obtained by Bloomberg's Mark Gurman. Here is Srouji's full memo, as shared by Bloomberg:I know you've been reading all kind of rumors and...
top stories 2025 12 04a

Top Stories: iOS 26.2 Coming Soon, Apple Execs Depart, and More

Saturday December 6, 2025 6:00 am PST by
You'd expect things to be starting to wind down for the holidays by now, but that doesn't seem to be the case yet in the world of Apple news, with Apple just about ready to release iOS 26.2 and other operating system updates to the public. There was also a flurry of news this week about Apple executive departures, some expected and some not so expected, while we also learned that Apple and...
maxresdefault

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Monday December 1, 2025 3:00 am PST by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Subscribe to the MacRumors YouTube channel for more videos. Below, we've collated an updated set of key details that ...