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
53 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
53 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
53 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
53 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
53 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
53 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 SE 4 Vertical Camera Feature

iPhone SE 4 Production Will Reportedly Begin Ramping Up in October

Tuesday July 23, 2024 2:00 pm PDT by
Following nearly two years of rumors about a fourth-generation iPhone SE, The Information today reported that Apple suppliers are finally planning to begin ramping up mass production of the device in October of this year. If accurate, that timeframe would mean that the next iPhone SE would not be announced alongside the iPhone 16 series in September, as expected. Instead, the report...
iPhone 17 Plus Feature

iPhone 17 Lineup Specs Detail Display Upgrade and New High-End Model

Monday July 22, 2024 4:33 am PDT by
Key details about the overall specifications of the iPhone 17 lineup have been shared by the leaker known as "Ice Universe," clarifying several important aspects of next year's devices. Reports in recent months have converged in agreement that Apple will discontinue the "Plus" iPhone model in 2025 while introducing an all-new iPhone 17 "Slim" model as an even more high-end option sitting...
Generic iPhone 17 Feature With Full Width Dynamic Island

Kuo: Ultra-Thin iPhone 17 to Feature A19 Chip, Single Rear Camera, Semi-Titanium Frame, and More

Wednesday July 24, 2024 9:06 am PDT by
Apple supply chain analyst Ming-Chi Kuo today shared alleged specifications for a new ultra-thin iPhone 17 model rumored to launch next year. Kuo expects the device to be equipped with a 6.6-inch display with a current-size Dynamic Island, a standard A19 chip rather than an A19 Pro chip, a single rear camera, and an Apple-designed 5G chip. He also expects the device to have a...
iPhone 16 Pro Sizes Feature

iPhone 16 Series Is Less Than Two Months Away: Everything We Know

Thursday July 25, 2024 5:43 am PDT by
Apple typically releases its new iPhone series around mid-September, which means we are about two months out from the launch of the iPhone 16. Like the iPhone 15 series, this year's lineup is expected to stick with four models – iPhone 16, iPhone 16 Plus, iPhone 16 Pro, and iPhone 16 Pro Max – although there are plenty of design differences and new features to take into account. To bring ...
icloud private relay outage

iCloud Private Relay Experiencing Outage

Thursday July 25, 2024 3:18 pm PDT by
Apple’s iCloud Private Relay service is down for some users, according to Apple’s System Status page. Apple says that the iCloud Private Relay service may be slow or unavailable. The outage started at 2:34 p.m. Eastern Time, but it does not appear to be affecting all iCloud users. Some impacted users are unable to browse the web without turning iCloud Private Relay off, while others are...
iPhone 17 Plus Feature Purple

iPhone 17 Rumored to Feature Mechanical Aperture

Tuesday July 23, 2024 9:32 am PDT by
Apple is planning to release at least one iPhone 17 model next year with mechanical aperture, according to a report published today by The Information. The mechanical system would allow users to adjust the size of the iPhone 17's aperture, which refers to the opening of the camera lens through which light enters. All existing iPhone camera lenses have fixed apertures, but some Android...