Apple Releases macOS Catalina 10.15.7 Supplemental Update With Security Fixes - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases macOS Catalina 10.15.7 Supplemental Update With Security Fixes

Apple today released a supplemental update for macOS Catalina 10.15.7, introducing security fixes. The macOS 10.15.7 Supplemental Update comes more than a month after the release of macOS Catalina 10.15.7.

Catalina10
The ‌‌‌‌macOS Catalina‌‌‌‌ 10.15.7 Supplemental Update can be downloaded from the Mac App Store using the Update feature in the System Preferences app.

According to Apple's release notes, the Supplemental Update improves the security of macOS and is recommended for all users. An Apple support document outlines several vulnerabilities that that have been addressed, including those that leave the Mac vulnerable to malicious fonts and applications.

macOS Catalina will soon be replaced by macOS Big Sur, which is in the final stages of beta testing and could be released as soon as next week.

Related Forum: macOS Catalina

Popular Stories

iOS 27 on iPhone 17 1

iOS 27 Will Add These New Features to Your iPhone

Saturday May 2, 2026 8:43 am PDT by
Apple is expected to unveil iOS 27 during its WWDC 2026 keynote on June 8, and there are already many rumored features and changes for iPhones. The first developer beta of iOS 27 will likely be available immediately following the keynote, and a public beta typically follows in July. Following beta testing, the software update should be released to all users with a compatible iPhone in...
Apple Event Logo

Apple Just Released a New Accessory

Monday May 4, 2026 8:13 am PDT by
Apple today released a new Pride Edition Sport Loop for the Apple Watch. The band features a rainbow design with 11 colors of woven nylon yarns. The new Pride Edition Sport Loop is available to order now on Apple.com and in the Apple Store app in 40mm, 42mm, and 46mm sizes, and it will be available at Apple Store locations starting later this week. In the U.S., the band costs $49. There...
Apple Announces 2026 Pride Band Watch Face and iPhone Wallpaper Article 2

iOS 26.5 Coming Soon With These New Features

Monday May 4, 2026 8:40 am PDT by
iOS 26.5 is expected to be released next week, following more than a month of beta testing. The update is relatively minor, but there are a couple of new features and changes across the operating system that we have recapped below. iOS 26.5 lays the groundwork for end-to-end encryption for RCS in the Messages app and ads in the Apple Maps app, and it will include a new Pride wallpaper and a...

Top Rated Comments

TVreporter Avatar
72 months ago
What if you're still on Mojave because it runs so smoothly and the endless stories of the dumpster fire that's Catalina are a deterrent not to update?
Score: 25 Votes (Like | Disagree)
dspdoc Avatar
72 months ago
I think a lot of people are simply hating on Catalina out of habit now. It’s sad.
Score: 20 Votes (Like | Disagree)
72 months ago
Why don't they have a minor version number instead of calling it a supplemental update?

I just updated and there is no way to tell whether or not the update actually happened.

Edit: @Unsupported showed me ('https://forums.macrumors.com/threads/apple-releases-macos-catalina-10-15-7-supplemental-update-with-security-fixes.2265661/post-29169450') how to find it. That can also be found under
About This Mac -> System Report -> Software
But having a minor version number would be so much easier.

Attachment Image
Score: 20 Votes (Like | Disagree)
jonnysods Avatar
72 months ago

What if you're still on Mojave because it runs so smoothly and the endless stories of the dumpster fire that's Catalina are a deterrent not to update?
Catalina is a lot better than it used to be. Mojave will always be my fav since Snow Leopard though.
Score: 17 Votes (Like | Disagree)
luvbug Avatar
72 months ago

Mojave has anther year of security updates yet, no need to migrate to either of the disasters that are Apple's last two OS releases.
So, you pronounce Big Sur a disaster, even though it hasn't been released yet? Another very objective post on MR /s
Score: 15 Votes (Like | Disagree)
72 months ago

What if you're still on Mojave because it runs so smoothly and the endless stories of the dumpster fire that's Catalina are a deterrent not to update?
Mojave has anther year of security updates yet, no need to migrate to either of the disasters that are Apple's last two OS releases.
Score: 12 Votes (Like | Disagree)
Related Apple News: Ipad | Culture | Local News | Business | Ipad