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macrumors bot
Original poster
Apr 12, 2001

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.


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.

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

macrumors 604
Mar 10, 2011
I've been having an issue with 10.15.5 where it doesn't automatically go to sleep after the 10 minutes of inactivity I have my Mac set to.

Hoping they fix this bug.

What year and model Mac are you using? What things have you tried to resolve the issue?
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Taz Mangus

macrumors 604
Mar 10, 2011


macrumors regular
May 1, 2020
Any news about the persisting Apple Mail Bugs? Apple Support confirmed my iCloud sync issue is an unresolved bug in the current version of Apple Mail in 10.15.5, but so far had no details on an estimated fix date. Currently no workaround possible instead of refraining from using Apple Mail at all...


macrumors 6502
Jan 17, 2012
I think the OP might be referring to SSV.

Very interesting. Looks like it can be disabled, though currently seems to be a bit of a PITA. Of course, disabling SFF also reduces security, although not less than Catalina obviously.
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macrumors G5
Aug 10, 2007
I'm a rolling stone.
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macrumors 6502a
Oct 12, 2014
Mojave. The new snow leopard?

I'm on Mojave and my 2014 MBA" with just 4GB RAM still going on without any major problem.
I'm probably getting an ARM MBP some months after the release after the reviews and people's experiences, or just wait for 2nd gen but if something I'm sure about it's I'll be skipping Catalina (as I skipped Lion & Mountain Lion until Mavericks)
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