Apple Releases macOS Catalina 10.15.5 Supplemental Update With Security Fix

[MacRumors]

Apple today released a supplemental update for macOS Catalina 10.15.5, the fifth update to the macOS Catalina operating system that was released in October 2019. The supplemental update comes a week after the release of the macOS Catalina 10.15.5 update.

‌macOS Catalina‌ 10.15.5 is a free update that can be downloaded from the Mac App Store using the Update feature in the System Preferences app. There's also a security update for those running macOS High Sierra.

The first macOS Catalina 10.15.5 update introduced a new Battery Health Management feature designed to extend the overall lifespan of a Mac's battery by reducing the rate of chemical aging. It also included controls to fine-tune the calibration of the Pro Display XDR and an option to control Automatic Prominence in a Group FaceTime call.

The supplemental update focuses on security fixes and Apple says it should be installed by all users.

macOS Catalina 10.15.5 supplemental update provides important security updates and is recommended for all users.

Some features may not be available for all regions, or on all Apple devices. For detailed information about the security content of this update, please visit: https://support.apple.com/en-us/HT211215

According to the security notes for the update, it addresses a security flaw that could allow an application to execute arbitrary code with kernel privileges.

This is the same vulnerability that has been addressed in today's iOS 13.5.1, tvOS 13.4.6, and watchOS 6.2.6 updates, and it allowed for the unc0ver jailbreak that allegedly works on all versions of iOS, including iOS 13.5.

Article Link: Apple Releases macOS Catalina 10.15.5 Supplemental Update With Security Fix

 

[MacBird]

There is also an update for High Sierra and presumably Mojave.

 

[Camarillo Brillo]

Great, a security fix, but did they fix any of the broken features in 10.15.4 and 10.15.5 on the 16" MacBook Pro? Probably not.

 

[jb-net]

Lets take a look at what new bugs Apple introduced this time. The last Catalina updates were horrible. Breaking more things than fixing.

 

[chrfr]

There is also an update for High Sierra and presumably Mojave.

Just High Sierra, for some reason. There's no new Mojave update.

 

[MacBird]

Just High Sierra, for some reason. There's no new Mojave update.

Interesting that Mojave didn't get updated.

 

[nylon]

This took forever to install on my 2016 15" TB MBP.

 

[317342]

At risk of sounding whiney, what on earth is going on with all the "supplemental updates" lately? --it's getting a little ridiculous.

 

[Rafterman]

Apple, getting so tired of this "fxing the fix" bullcr@p. Every single time now, there's always a second patch. Get it right the FIRST time.

 

[nwcs]

Apple, getting so tired of this "fxing the fix" bullcr@p. Every single time now, there's always a second patch. Get it right the FIRST time.

Not possible with security related items. It’s always a cat and mouse game and that’s just the way it is.

 

[ouimetnick]

I’ll stay on Mojave until the next major release. I’ve upgraded to every single release of Mac OS X since Leopard. Lion was pretty bad at first, but I don’t trust Catalina. I also don’t want to have Apple Music shoves in my face either.

 

[iFoure]

App Store tells me that Security Update 2020-003 is available again? I've already installed it on may 26th (I'm on High Sierra 10.13.6) So should I install it for the second time? Has Apple re-issued it or what's going on O_O

 

[robgendreau]

I'm curious: why is an update like this so large, and why does it take so long after download for the update to install?

 

[Bryan Bowler]

Just say no to Catalina!

 

[calstanford]

1.6 GIGAbytes for a small security patch. Ugh Apple. Come on.

 

[kdekorte]

1.59GB on my MacBook Pro 16 that was on 10.15.5, seems like a rather large supplement.

 

[FlyGuyDEN]

Seriously-you guys are complaining about security updates? Get a grip.

 

[Bill Nadraszky]

Looks like this was mostly to fix the hole that allowed the latest Jailbreak last week

 

[filchermcurr]

If anybody is reading this before updating, beware: It will take an eternity to install. Snacks and/or a solid reason to go on living are recommended.

In related news, not too heavy on the firmware this time around. 2018 Mac mini got an iBridge bump and T2 firmware update, neither of which were a monumental jump in version number.

 

[Barry K. Nathan]

App Store tells me that Security Update 2020-003 is available again? I've already installed it on may 26th (I'm on High Sierra 10.13.6) So should I install it for the second time? Has Apple re-issued it or what's going on O_O

Yes, Apple reissued it with a fix for the security hole that's used by the unc0ver jailbreak. (macOS and iOS/iPadOS are based on the same kernel, so as a general rule, if there's a security hole in the kernel on iPhones, it probably affects Macs as well.)

The weird thing is that there's an update for High Sierra, and an update for Catalina, but no update for Mojave.

 

[mdriftmeyer]

At risk of sounding whiney, what on earth is going on with all the "supplemental updates" lately? --it's getting a little ridiculous.

Security experts are testing and hardening the system in exchange for bounty rewards. That's the why of it--more pros hacking on it to flush out potential exploits.

Oracle has done it for years.

 

[sugargliderdude]

wow, that update took ages to update, guess it was changing quite a few things.

 

[justme1]

I have a 2019 21.5 iMac still on 10.15.4 everything I've read points to the fact that all the 10.15.5 changes are only for laptops. Any reason that iMac people need to update? Thanks.

 

[lostczech]

Just High Sierra, for some reason. There's no new Mojave update.

Maybe just hit a little late. I just got these for Mojave:

 

[chrfr]

I have a 2019 21.5 iMac still on 10.15.4 everything I've read points to the fact that all the 10.15.5 changes are only for laptops. Any reason that iMac people need to update? Thanks.

It fixes a lot of things that aren't laptop specific. There are these: https://support.apple.com/en-us/HT210642
as well as 41 security fixes: https://support.apple.com/en-us/HT211170
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Maybe just hit a little late. I just got these for Mojave:
View attachment 920693

They're not from today.