Apple today seeded the fourth beta of an upcoming macOS Catalina 10.15.6 update to developers for testing purposes, a week and a half releasing the third beta and over a month after releasing macOS Catalina 10.15.5 with battery health management features for Macs.

macos catalina wallpaper
The macOS Catalina 10.15.6 beta can be downloaded from the Software Update mechanism in System Preferences after the proper profile has been installed from the Apple Developer Center.

There's no word yet on what improvements the new update to macOS Catalina brings, but it likely includes performance improvements, security updates, and fixes for bugs that weren't able to be addressed in the previous update. No new features were found in the first three betas, but we'll update this article should anything new be found in the fourth beta.

Related Forum: macOS Catalina

Top Rated Comments

jb-net Avatar
65 months ago
Is Apple even interested in fixing all the bugs in Catalina or a the just working on their ARM project? There are so many open bugs in Catalina, its mind-blowing! :mad:
Score: 12 Votes (Like | Disagree)
ScooterComputer Avatar
65 months ago

There are so many open bugs in Catalina, its mind-blowing! :mad:
What’s especially infuriating to me, as a 2012 MacBook Pro user, is that Apple has ONCE AGAIN decided to abandon a large chunk of users on a really buggy OS. Last time it was High Sierra. At this point, it’s pretty naked they’re doing it to drive new sales, which is supremely scummy. Worse IMHO is that they are cleaving off good popular work horse Macs, while supporting 4 years of known-garbage MacBook keyboards and warmed-over hard-drive-based iMacs. It’s like I’m being punished for not being stupid and just buying whatever crap Apple decided to poop out since 2016.

The community needs to get smarter, more vocal over this nonsense; it’s getting worse, not better. This Exec Team is revealing itself to be despicable.
Score: 7 Votes (Like | Disagree)
RLK7 Avatar
65 months ago
Be careful! With a 2018 MacBook Pro 15 it wont recognize your keyboard or trackpad so I can’t log in! Even safe mode doesn’t let you use the keyboard/mouse. How does something that basic get through even the first beta?
Score: 3 Votes (Like | Disagree)
TheSkywalker77 Avatar
65 months ago
Well, here goes what is likely one of the last updates to my 2012 MBP. It’s been a fun ride.


Time to wait for dosdude1’s Big Sur patcher! :)
Score: 3 Votes (Like | Disagree)
dickie001x Avatar
65 months ago

I finally bit the bullet a few months ago and moved my Macs from High Sierra to Mojave - I wanted to see if there were going to be any glaring issues before High Sierra fell off the security fix wagon.

All in all, Mojave seems mostly reliable (which wasn't my experience with provisional installs of earlier versions of Mojave). Main difference from High Sierra is that it's a bit more locked down security-wise, you have sometimes to go into Security & Privacy preferences to authorize special access for certain apps when they're first installed. AND the biggest bugaboo there is that you don't always get a notification that you need to do that - but if you miss the initial 30 minute window to approve the app's access... you're SOL!!

(actually you're not completely SOL, you can usually completely uninstall the app, reboot and then reinstall to restart another 30-minute authorization window. But it can be a silent failure, with no explanation regarding why an app isn't functioning as expected).
Disable Gatekeeper with the following command in Teminal:

sudo spctl --master-disable
Score: 2 Votes (Like | Disagree)
5097842 Avatar
65 months ago

Still running High Sierra here and will upgrade to Mojave when my apps end support for it and Apple requires 10.14 or later. My concern is, should I just leave my MBP 2015 at Mojave since it seems Catalina and later seems not be particularly worth it both feature and stability wise? All I've been hearing about Sierra since it was launched is stability issues and bugs.
Yes, I would stick with Mojave. My MBA is still on Mojave, unfortunately my 16" MBP only runs Catalina. I may try the Big Sur beta on the Air to see how it compares to Catalina. (don't want my primary machine on a beta) Hopefully Big Sur is an improvement ...
Score: 2 Votes (Like | Disagree)

Popular Stories

iphone 16 pro ghost hand

5 Reasons to Skip This Year's iPhone 17 Pro

Thursday July 10, 2025 4:54 am PDT by
Apple will launch its new iPhone 17 series in two months, and the iPhone 17 Pro models are expected to get a new design for the rear casing and the camera area. But more significant changes to the lineup are not expected until next year, when the iPhone 18 models arrive. If you're thinking of trading in your iPhone for this year's latest, consider the following features rumored to be coming...
apple wallet drivers license feature iPhone 15 pro

Apple Says iPhone Driver's Licenses Will Expand to These 8 U.S. States

Tuesday July 8, 2025 11:26 am PDT by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Unfortunately, this feature continues to roll out very slowly since it was announced in 2021, with only nine U.S. states, Puerto Rico,...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro to Reverse iPhone X Design Decision

Monday July 7, 2025 9:46 am PDT by
Since the iPhone X in 2017, all of Apple's highest-end iPhone models have featured either stainless steel or titanium frames, but it has now been rumored that this design decision will be coming to an end with the iPhone 17 Pro models later this year. In a post on Chinese social media platform Weibo today, the account Instant Digital said that the iPhone 17 Pro models will have an aluminum...
iPhone 17 Pro in Hand Feature Lowgo

Leaker Reveals Amount of RAM in iPhone 17 Through iPhone 17 Pro Max

Wednesday July 9, 2025 8:08 am PDT by
Three out of four iPhone 17 models will feature more RAM than the equivalent iPhone 16 models, according to a new leak that aligns with previous rumors. The all-new iPhone 17 Air, the iPhone 17 Pro, and the iPhone 17 Pro Max will each be equipped with 12GB of RAM, according to Fixed Focus Digital, an account with more than two million followers on Chinese social media platform Weibo. The...
apple account card feature

Apple Account Card Expanding to More Countries

Tuesday July 8, 2025 7:34 pm PDT by
Apple is expanding the ability to add an Apple Account Card to the Wallet app to more countries, according to backend Apple Pay changes. With iOS 15.5, Apple updated the Wallet app to allow users to add an Apple Account Card, which displays the Apple credit balance associated with an Apple ID. If you receive an Apple gift card, for example, it is added to an Apple Account that is also...
macbook pro blue green

M5 MacBook Pro No Longer Coming in 2025

Thursday July 10, 2025 12:38 pm PDT by
Apple does not plan to refresh any Macs with updated M5 chips in 2025, according to Bloomberg's Mark Gurman. Updated MacBook Air and MacBook Pro models are now planned for the first half of 2026. Gurman previously said that Apple would debut the M5 MacBook Pro models in late 2025, but his newest report suggests that Apple is "considering" pushing them back to 2026. Apple is now said to be...
iOS 26 Feature

Everything New in iOS 26 Beta 3

Monday July 7, 2025 1:20 pm PDT by
Apple is continuing to refine and update iOS 26, and beta three features smaller changes than we saw in beta 2, plus further tweaks to the Liquid Glass design. Apple is gearing up for the next phase of beta testing, and the company has promised that a public beta is set to come out in July. Transparency In some apps like Apple Music, Podcasts, and the App Store, Apple has toned down the...
iCloud General Feature Redux

iPhone Users Who Pay for iCloud Storage Receive These Five Perks

Wednesday July 9, 2025 9:20 am PDT by
If you pay for iCloud storage on your iPhone, did you know that Apple offers you five perks beyond the extra storage space, at no additional cost? Here are the perks included with all iCloud+ plans:Private Relay keeps your Safari browsing history entirely private from network providers, websites, and even Apple. Hide My Email generates unique, random email addresses whenever needed. Hom...
Foldable iPhone 2023 Feature 1

Foldable iPhone Display Production Begins Ahead of Launch Next Year

Wednesday July 9, 2025 10:59 pm PDT by
Production of foldable OLED displays for Apple's first foldable iPhone have begun ahead of its expected launch next year, Korea's ETNews reports. The first foldable iPhone's displays are being produced by Samsung Display, who are establishing a production line dedicated to the upcoming Apple device its A3 factory in Asan, Chungcheongnam-do. The production line will make displays exclusively...