In previous versions of OS X, before Mountain Lion, one could use the System Preference called Software Update to both update the OS and also view a list of system updates that have been applied. Check For Mac Overview System; There are two ways to see the entire list of macOS software updates. Check For Mac Overview System. Apple Menu About This Mac Overview System Report Software Installations ApplicationsUtilitiesSystem Information.app; Software Installations Either way, youll end up on in a window that looks like this: Previous macOS security updates The default is alphabetical. How to update your Mac. Most Mac users don’t need to install drivers for graphics cards, printers, or scanners because they are taken care of with operating system updates. To install a printer or scanner on your Mac, just plug it in. Wait as your Mac searches Apple's servers for any macOS software updates currently available for your system. If no updates are available, you'll be returned to the command prompt.

View your system update history | 4 comments | Create New Account

Click here to return to the 'View your system update history' hint

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I tried this hint expecting to see all installed 'programs' (quoted because I don't know what else to call these bits and pieces), but it only shows software updates. This isn't surprising on reflection, but the reference to /Library/Receipts led me to think that everything would show up.
Still a useful hint, one just has to realize the difference. Ebook reader software. For example, one of my receipts is for 'DevTools.pkg' which to me seems like a system update/modification.
Which brings up a bigger question. Do you have a repository of hints on where everything is in OS X? Receipts being one, Explorer Favorites, caches, start-ups at launch being others. As a start, the things we were used to in OS 9, and then all the others that we may want to check or delete. Also, which ones can be deleted and with what consequences (from 'will be rebuilt at boot or launch, ' lose history, but app will function fine, to 'what the @!#$%^&* have I done to my computer? Help!')

There is no 'Logs' button in Mac OS 10.7. Click the 'Installed Software' tab instead. Note that, by default, they're sorted by date.
Anyhow, still a great tip!

How To Update Apple Computer Operating System

'Click the 'Installed Software' tab instead. '
Not in 10.8.2 (8-(#
I am still searching!

Check For Updates Mac Os

Found it under 'System Information => Installations'.
Quick load is open the 'Apple' icon dropdown, press alt, and 'About This Mac' becomes 'System Information'.

How To Check For System Updates Mac