If you’re looking for specific hardware or software information about your Mac, maybe to troubleshoot a problem, perhaps to upgrade your system, or possibly to check on the versions of certain installed applications, you can dig up all that data and more through the Mac’s System Information utility. Built into macOS, System Information provides a wealth of details about your hardware, software, and network. Here’s how it works.
You can open System Information one of two ways. In Finder, click the Go menu, browse to Utilities, and in the window that appears, open the System Information app. Alternatively, click the Apple menu, select About This Mac. At the popup window, select System Report.
Read more at Macworld.com