Before Catalina, each macOS update wrote a full transcript of all it installed to a BoM file, which you can inspect. That stopped, without any substitute.
SystHist
LockRattler 4.31 and SystHist 1.15 prepare for the release of Monterey, and include minor fixes for earlier versions of macOS as well.
New version can display contents of all system updates for Catalina and Big Sur’s boot volume group, at last.
You can find out which EFI version your Mac is running, but how do you know whether that’s current, or old and vulnerable?
Text in the centre view listing updates and installations can now be set to 4 to 24 points in size.
Adds the new automatic system for checking whether an update is available, and downloaded it when it is. Also addresses minor issues with Catalina beta 1.
Minor updates, which check their code signatures each time they start up.
You’re running High Sierra, but SystHist reckons you installed Mojave, and have recently applied High Sierra security updates. Isn’t it wrong?
A minor update which displays the running version of macOS, and updates its Help book.
New versions giving easy access to new product pages with support info, and dedicated support pages here.
The Eclectic Light Company 