Apple Seeds Second Beta of Upcoming macOS Catalina 10.15.6 Update to Developers

Apple today seeded the second beta of an upcoming macOS Catalina 10.15.6 update to developers for testing purposes, one week after seeding the first beta and two weeks 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 beta, but we'll update this article should anything new be found in the second beta.

Related Forum: macOS Catalina

Popular Stories

iPhone 17 Pro Dark Blue and Orange

When Is iPhone 17 Coming Out?

Thursday July 24, 2025 9:11 am PDT by
Apple's iPhone 17 series is expected to debut in September 2025. This release follows Apple's recent trend of introducing new iPhone models annually in the fall. To unveil the iPhone 17, iPhone 17 Air, iPhone 17 Pro, and iPhone 17 Pro Max, Apple is expected to hold its annual iPhone announcement event during the week of September 8, 2025, with September 9 or 10 emerging as the most likely...
iPhone 17 Pro on Desk Centered 1

iPhone 17 Pro Launching in Two Months With These 16 New Features

Saturday July 26, 2025 5:50 am PDT by
Apple's iPhone 17 Pro and iPhone 17 Pro Max should launch in late September, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models, as of July 2025:Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone X through iPhone 14...
iPhone 17 Pro on Desk Centered 1

Tipster: iPhone 17 Pro to Feature 8x Zoom, Pro Camera App, and More

Sunday July 27, 2025 7:35 am PDT by
Apple's upcoming iPhone 17 Pro models will have several new camera-related features, according to an anonymous tipster who contacted MacRumors today. The tipster claimed to be familiar with an iPhone 17 Pro commercial that is allegedly being produced by a film company that has publicly listed Apple as one of its clients. MacRumors has not independently confirmed any of the information shared ...
Apple Watch Ultra 2 Complications

Apple Watch Ultra 3: What to Expect

Thursday July 24, 2025 7:08 am PDT by
The long wait for an Apple Watch Ultra 3 is nearly over, and a handful of new features and changes have been rumored for the device. Below, we recap what to expect from the Apple Watch Ultra 3:Satellite connectivity for sending and receiving text messages when Wi-Fi and cellular coverage is unavailable 5G support, up from LTE on the Apple Watch Ultra 2 Likely a wide-angle OLED display that ...
Apple Partridge Creek

Apple Store in Michigan Permanently Closing Next Month

Saturday July 26, 2025 1:51 pm PDT by
Earlier this month, MacRumors was first to report that Apple was planning to permanently close its Partridge Creek store, just outside of Detroit, Michigan, and now the company has announced a closure date for the location. Apple Partridge Creek Apple Partridge Creek's final day of business will be Saturday, August 16, with the store set to close for good at 8 p.m. local time that day. All of ...
iOS 18

Apple Shares iOS 18.6 Release Notes

Thursday July 24, 2025 6:33 am PDT by
While the focus is now on iOS 26, there is still an iOS 18.6 update incoming. As noted by Aaron Zollo, Apple on Wednesday re-labeled iOS 18.6 Beta 4 as simply iOS 18.6, meaning that it is the Release Candidate version. This change effectively confirms that the update will be released to the public next week. Alongside the new label, Apple shared release notes for iOS 18.6, which is a...
iPhone 17 Colors

All 15 New iPhone 17 and iPhone 17 Pro Colors Leaked

Friday July 25, 2025 6:20 am PDT by
We may finally have a definitive list of all color options for the iPhone 17 series, ahead of the devices launching in September. MacRumors concept In a Macworld report this month, Filipe Espósito said he obtained an "internal document" that allegedly reveals all of the color options for the upcoming iPhone 17, iPhone 17 Air, iPhone 17 Pro, and iPhone 17 Pro Max models. The report...
iPhone 17 Pro on Desk Centered 1

iPhone 17 Pro Launching in Two Months With These 16 New Features

Tuesday July 22, 2025 5:00 pm PDT by
Apple's iPhone 17 Pro and iPhone 17 Pro Max are less than two months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models, as of July 2025:Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone X through iPhone 14...

Top Rated Comments

sugargliderdude Avatar
67 months ago

This may be the first Mac OS I completely skip.
thanks for sharing that, have a great day.
Score: 27 Votes (Like | Disagree)
greenbreadmmm Avatar
67 months ago
This may be the first Mac OS I completely skip.
Score: 14 Votes (Like | Disagree)
Adult80HD Avatar
67 months ago

After using Windows 10 for a while, Catalina looks so boring o_O. If you really love macOS, stay away from Windows, no matter what.
I beg to differ. I have to use both and I find Windows 10 to be...annoying. The UI is extremely inconsistent, going back and forth between the "new" look that isn't so new, and items that look like they're from 20 years ago in Windows 2000. Some tasks are buried maddeningly deep in menus or controls. Thanks but no thanks.
Score: 10 Votes (Like | Disagree)
Kylo83 Avatar
67 months ago
still hasn't fixed the audio popping smh
Score: 10 Votes (Like | Disagree)
Sammio2 Avatar
67 months ago
If this doesn’t fix the 16” MBP kernel panic when waking from sleep I swear to god...
Score: 8 Votes (Like | Disagree)
bomby0 Avatar
67 months ago
I bet the 16" MBP overheating when an external monitor is attached bug still isn't fixed lol
Score: 8 Votes (Like | Disagree)