Apple has just released the Catalina update to 10.15.2, which weighs in at just under 3.5 GB, and Security Updates for High Sierra and Mojave. The latter is Security Update 2019-002, and is around 2GB.

Catalina 10.15.2 has detailed release notes, which list among others:

• improvements in News+ and Stocks;
• Music restores the column browser view, fixes a bug with album artwork, and another which can reset equaliser settings during playback;
• adds support for iOS/iPadOS devices as remote controllers for Music and TV;
• fixes four bugs in Photos, including better reliability with some AVI and MP4 files;
• fixes two bugs in Mail, including blank Preferences windows, and problem with Undo retrieving deleted messages;
• improves the reliability of syncing books and audiobooks with iOS/iPadOS devices through the Finder;
• fixes a bug in the order of reminders in the Reminders app;
• fixes poor typing response in Notes;
• fixes an issue where the user password might not be accepted in T2 Macs upgraded to Catalina.

Security release notes for 10.15.2 and the two security updates are here, and include two kernel bugs, one of which affects all three versions of macOS, and updates to OpenLDAP 2.4.28, tcpdump 4.9.3 and libpcap 1.9.1 in Catalina.

Bundled in the 10.15.2 update (but not apparently the Security Updates) is an update to XProtect, bringing it to version 2109. This means that Catalina systems are now running a different version of the XProtect database from those on Mojave and earlier.

Some more recent models, whether running 10.15.2 or 10.13/10.14, have firmware updates included in the main update. I have updated the respective pages here, and the databases used by SilentKnight. Unfortunately, in many cases, the firmware versions still aren’t uniform across all three versions of macOS, and Sierra systems remain without those firmware updates altogether. If you’re still running Sierra and think you have firmware problems which will be fixed by an update, then your only option is to upgrade to High Sierra or later. Sierra is very much unsupported now.

These updates include the firmware for T2 chips, which are brought up to a common version, together with that of the iBridge or BridgeOS. These are the same regardless of Mac model or version of macOS being run.

Standalone installers are now available for Catalina 10.15.2 update or as the Combo update, Mojave Security Update 2019-002, and High Sierra Security Update 2019-007.

There is a further separate update available which brings Safari up to version 13.0.4.

Many thanks to Pico, who generously extracted all the firmware versions from the three different installers.

Last updated at 1820 UTC 11 December 2019 with Combo update link.