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During this time, Apple cofounder Steve Jobs had left Apple and started another company, NeXT, developing the NeXTSTEP platform that would later be acquired by Apple to form the basis of macOS. MacOS succeeded the classic Mac OS, a Mac operating system with nine releases from 1984 to 1999.

Within the market of desktop and laptop computers, it is the second most widely used desktop OS, after Microsoft Windows and ahead of ChromeOS. It is the primary operating system for Apple's Mac computers. Maybe you’d like to see which version of an app or macOS you have or review other installations that happened behind the scenes.MacOS ( / ˌ m æ k oʊ ˈ ɛ s/ previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. This shows all installations and updates for various macOS versions.Įven if you don’t need this information to troubleshoot a problem, it can still come in handy. In this next screenshot, you can see it’s sorted by Software Name.

You can see that GarageBand and TickTick were updated on January 10. For instance, the screenshot below shows the installations sorted by Install Date. If you’re looking for a particular date or software name, it’s easier to click on the column and sort by it. You will see columns for Software Name, Version, Source, and Install Date on the right side. Now, just scroll down to the last section on the left labeled Software and expand it with the arrow if necessary (you can collapse the Hardware and Network sections if you like).Ĭlick on Installations. You’ll end up in the same spot with whichever method you use above. Open the Utilities folder from your applications.Click the Apple icon  from your menu bar.There are two quick ways to see System Information on your Mac: Here’s how to see the exact dates for app and macOS updates on Mac. To help narrow down your search, you can easily check your Mac for all installations and when they occurred. Was it an app update that may have caused the problem? Did something go wrong during the last macOS update? If you’re trying to troubleshoot an issue on your Mac and know when it first occurred, you likely want to get more information about what happened on your system on that particular day (or range of days).