Locate dates of installed OS X updates
When I go to the Apple Store to check for updates, I see the completed update history for only the preceding 30 days. How can I find earlier update history?
OS X Yosemite (10.10.5)
Hold down the option/alt key while going to the menu and select System Information (or the 1st choice). The report that is generated has a Software section. Under that see Installations. Click on the Install Date to get a sorted by install date.