SilentKnight, silnite, LockRattler, SystHist & Scrub

SilentKnight (previously EFIcienC) – a new generation with fully automatic security checks

A replacement for LockRattler to perform its assessments and check whether your Mac is up to date automatically. Checks EFI firmware, security settings and data files, and has both a summary Help page and a detailed reference. Update adds support for KEXT blocker in Catalina.
SilentKnight 1.4 (El Capitan, Sierra, High Sierra, Mojave and Catalina)

silnite – a command tool which performs the same checks as SilentKnight

If you’re managing Macs on a network, this is an invaluable way of checking EFI firmware, security settings including SIP and FileVault, and security data file updates. A choice of two levels of detail, which can include checks against my database of current versions, and reports to stdout in either text or JSONised XML. Can also download and install waiting updates. Update adds support for KEXT blocker in Catalina.
silnite 3 (El Capitan, Sierra, High Sierra, Mojave and Catalina)

LockRattler – a quick check of your security systems

LockRattler checks your Mac’s basic security systems are active, reports version numbers of security configuration files which are active, the latest updates installed, and makes it easy to check for and install updates. Ideal for checking that SIP is enabled, and it has Apple’s latest silent security updates. New version 4.23 improves support for KEXT blocker in Catalina.
LockRattler 4.24 (El Capitan, Sierra, High Sierra, Mojave and Catalina)

SystHist – lists full system and security update installation history

SystHist is a clean and simple app which tells you all the OS X/macOS system and security updates which have been installed on that Mac. Now probes deep into protected territory to find even silent silent updates, and gives details of all the files updated. New version 1.12 can change size of text in its middle reporting view.
SystHist 1.12 (El Capitan, Sierra, High Sierra, Mojave and Catalina)

Scrub – cleans folders and volumes of potentially leaking sensitive data

Scrub clears extended attributes which can show when a file was downloaded, and where from; old versions; turns off Spotlight indexing; clears the QuickLook cache; can even set all file dates to 1970. These greatly limit the forensic footprint of your most sensitive files. Powerful, so please read the docs carefully before use. First full release complete with Help file and many improvements.
Scrub 1.0 (El Capitan, Sierra, High Sierra, Mojave and Catalina)

Known Issues:

SilentKnight and silnite: FAQ
SilentKnight and EFI firmware checks

After updating any of the items which it checks, when you click on Refresh, LockRattler highlights changes in red. However, the version numbers shown in some of its boxes aren’t highlighted in red until you next open LockRattler. This is because those version numbers depend on obtaining the version number of a bundle, which macOS appears unable to refresh while the app is still running (it seems to be a bug in macOS).

Some apps break LockRattler’s update features

SystHist lists your Mac’s information about installed updates, which may in many cases not exactly match the version of macOS which it’s currently running. To help you see this more clearly, version 1.9 and later display the running version of macOS, so there’s no doubt.

Why is my system update history wrong?

How do you get a security update to work?
What happened when MRT was updated, and what MRT does
Why does SilentKnight/LockRattler show TCC is out of date?
What is this ‘Compatibility Notification Data’ which Apple has just updated?
Apple has added a new security database to Catalina, bringing 3 updates
SilentKnight, LockRattler and silnite updates to extend 10.15 checks

Support pages:

SilentKnight Support
silnite Support
LockRattler Support
SystHist Support
Scrub Support

Don’t try reverting a T2 to older firmware
Does replacing internal storage cause EFI updating problems?
Which EFI firmware should your Mac be using? (version 3)
Which EFI firmware should your Mac be using? (version 2)
SilentKnight’s security update checks from the command line
How has XProtect changed?

How Scrub 1.0 can help protect your privacy

Details of security data files for macOS:
Mojave (and Catalina beta)
High Sierra
El Capitan

Security update articles:

macOS 10.15 Catalina Supplemental Update, 15 October 2019
Gatekeeper Compatibility 1.0 (Catalina only), 11 October 2019
MRT 1.50 and XProtect 2106, 1 October 2019
macOS Mojave 10.14.6 Supplemental Update 2 (actually 3), plus Sierra and High Sierra Security Update 2019-005, 26 September 2019
MRT 1.49, 12 September 2019
macOS Mojave 10.14.6 Supplemental Update (take 2), 26 August 2019
Gatekeeper 181, 26 August 2019
Gatekeeper 179, 19 August 2019
MRT 1.48, 15 August 2019
macOS Mojave 10.14.6 Supplemental Update, 1 August 2019
Gatekeeper 175, 31 July 2019
Mojave 10.14.6 update, and Security Updates 2019-004 for Sierra and High Sierra, 22 July 2019
XProtect 2014, 22 July 2019
Gatekeeper 173, 22 July 2019
MRT 1.47, 18 July 2019
Gatekeeper 172, and MRT 1.46, 16 July 2019
MRT 1.45, 10 July 2019
Gatekeeper 171, 3 July 2019
Gatekeeper 170, 24 June 2019
MRT 1.42, 17 June 2019
Gatekeeper 169, 17 June 2019
TCC data 17.0, 5 June 2019 (Mojave only)
Gatekeeper 167, 3-4 June 2019
Apple releases additional firmware update for MacBook Pro 15 inch with T2 chip
Gatekeeper 166, 13 May 2019
KEXT Block data 14.5.1 (Mojave), 13 May 2019
Mojave 10.4.5 update, and Security Updates 2019-003 for Sierra and High Sierra, 13 May 2019
XProtect 2103, and MRT 1.41, 2 May 2019
XProtect 2102, 19 April 2019
Gatekeeper 165, 18 April 2019
Gatekeeper 164, 25 March 2019
Mojave 10.14.4 update, and Security Updates 2019-002 for Sierra and High Sierra
MRT 1.40, 21 February 2019
Gatekeeper 163, 20 February 2019
Gatekeeper 162, 7 February 2019
Mojave 10.14.3 Supplemental Update, fixing Group FaceTime bug
MRT 1.39, 5 February 2019
Mojave 10.14.3 and Security Updates 2019-001 for High Sierra and Sierra
Mojave 10.14.2 update, security updates for High Sierra and Sierra, and a Gatekeeper update
Mojave 10.14.1 update, and Security Updates for Sierra and High Sierra