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
48 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
48 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
48 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
48 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
48 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)
TallGuyGT Avatar
48 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

iOS 17

10 New Things Your iPhone Can Do in Next Week's iOS 17.4 Update

Friday March 1, 2024 1:30 am PST by
Apple will this month release iOS 17.4, its biggest iPhone software update of the year so far, featuring a number of features and changes that users have been anticipating for quite a while. Below, we've listed 10 new things that your iPhone will be able to do after you've installed the update, which is projected to arrive by March 7. When the day arrives, be sure to check Settings ➝...
Apple Maps vs Google Maps Feature

Apple Maps vs. Google Maps: Which Is Better?

Friday March 1, 2024 7:10 am PST by
Apple Maps has been providing navigational guidance to Apple users for almost 13 and a half years now, and much has changed about the app in that time. However, according to data from Canalys, the overwhelming majority of iPhones in the U.S. still have Google Maps downloaded as an alternative to Apple Maps, which comes preinstalled on all iPhones. We want to hear from MacRumors readers. Which do...
apple tv plus banner

Apple TV+ Gains Over 50 Movies for a Limited Time

Friday March 1, 2024 6:29 am PST by
Apple TV+ today gained over 50 movies, adding to its back catalog of content for a limited time. The collection includes a large number of popular and classic titles. Subscribers can access the movies in a "Great Movies on Apple TV+" section in the Apple TV app. Some titles are also available in 3D. Movies in the collection include: 21 Jump Street 300 American Sniper Argo ...
airpods pro 2 pink

Apple Releases New Beta Firmware for AirPods Pro 2

Thursday February 29, 2024 11:41 am PST by
Apple today introduced a new beta firmware update for the AirPods Pro 2, both the USB-C and Lightning versions. The new firmware is version 6E188, up from the prior 6B34 firmware released in December. Apple does not often provide details or notes on what features might be included in the refreshed firmware, so it is unclear what's new. Note that this software is limited to developers at the...
iOS 18 Mock Feature Baubles

Will Your iPhone Support iOS 18? Here's What the Latest Rumor Says

Thursday February 29, 2024 7:29 am PST by
iOS 18 and iPadOS 18 are still over three months away from being unveiled, but we may already know which devices will be compatible with the updates. iOS 18 will be compatible with the same iPhone models as iOS 17, meaning that the iPhone XS, iPhone XS Max, and iPhone XR from 2018 will remain supported for at least another year, according to information shared this week by a source with a...
iPad Pro OLED Feature 2

OLED iPad Pro's Thin Design Highlighted in CAD Drawings

Wednesday February 28, 2024 1:22 pm PST by
Apple is working on a new version of the iPad Pro that is set to launch as soon as March, and the refresh will mark the biggest design update to the Pro lineup since 2018. Apple is transitioning to OLED displays, and the swap will allow for a major change to the overall thickness of the device. CAD drawings of the upcoming ~11-inch and ~13-inch iPad Pro models give us some insight into just...