Apple Seeds Third Beta of Upcoming macOS Catalina 10.15.6 Update to Developers [Update: Public Beta Available] - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Third Beta of Upcoming macOS Catalina 10.15.6 Update to Developers [Update: Public Beta Available]

Apple today seeded the third beta of an upcoming macOS Catalina 10.15.6 update to developers for testing purposes, three weeks releasing the second 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 two betas, but we'll update this article should anything new be found in the third beta.

Related Forum: macOS Catalina

Popular Stories

Apple Event Logo

Apple Working on All-New Operating System

Wednesday July 29, 2026 11:39 am PDT by
Apple is developing an all-new operating system that is essentially a mix of tvOS, watchOS, and iOS, according to Bloomberg's Mark Gurman. In a report this week, he said the operating system will feature a grid of icons, widgets, and apps, along with customizable clock faces. The new software platform is intended for Apple's long-rumored smart home hub. With built-in facial recognition,...
imac video apple feature

Apple Made Its Second-Biggest Acquisition Ever This Year

Wednesday July 29, 2026 12:03 pm PDT by
Apple this year acquired Israeli startup Q.ai for close to $2 billion, according to the Financial Times. That would make this Apple's second-biggest acquisition ever, after it paid $3 billion for the popular headphone maker Beats in 2014. This is also the largest known Apple acquisition since the company purchased Intel's smartphone modem business and patents for $1 billion in 2019. Q.ai...
Dynamic Island iPhone 18 Pro Feature

iPhone 18 Pro: Twelve Changes Coming to Apple's Next Flagship

Thursday July 30, 2026 3:43 am PDT by
We're less than two months out from the launch of Apple's premium next-generation smartphone lineup, and while we're not expecting a dramatic change in terms of functionality, there are still several enhancements rumored to be coming to the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth noting is that Apple is reportedly planning a major change to its iPhone release cycle this year,...

Top Rated Comments

79 months ago
Mojave. The new snow leopard?
Score: 11 Votes (Like | Disagree)
79 months ago
I wonder if this will fix the random usb issues with random dropouts while using a usb-c hub?
Score: 4 Votes (Like | Disagree)
Taz Mangus Avatar
79 months ago

How so. Anything in particular stand out for you? Assuming SIP can still be disabled...
I think the OP might be referring to SSV.

https://eclecticlight.co/2020/06/25/big-surs-signed-system-volume-added-security-protection/
Score: 4 Votes (Like | Disagree)
79 months ago
Does this fix screen freezing or stuttering at random when using "automatic graphics switching" by any chance? I'm sick of this.
Score: 3 Votes (Like | Disagree)
jjm3 Avatar
79 months ago

Anyone got a build#?
Public beta is 19G60d
Score: 3 Votes (Like | Disagree)
star-affinity Avatar
79 months ago
All I'm thinking about is a fix for this:

Since installing Catalina yesterday, multiple crashes from userspace watchdog timeout
https://discussions.apple.com/thread/250715149?page=26

Pretty please?
Score: 3 Votes (Like | Disagree)

🔗 Related Apple News & Rumors

Stay updated with the latest Apple ecosystem news and verified rumors