Nov 12, 2020 Choose Apple menu About This Mac. This opens an overview of your Mac, including your Mac model, processor, memory, serial number, and version of macOS.To see the greater detail provided by the System Information app, click the System Report button. The problem comes when a user wishes to reinstall the operating system on a Mac computer, erase the hard disk, repair, or restore the device using Time Machine. During such a recovery, users often come face to face with the protection through the EFI firmware password.
Which macOS version is installed?
System Information Mac Os
From the Apple menu in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.
Which macOS version is the latest?
As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS. To get a later version, install the latest Apple software updates.
| macOS | Latest version |
|---|---|
| macOS Big Sur | 11.6 |
| macOS Catalina | 10.15.7 |
| macOS Mojave | 10.14.6 |
| macOS High Sierra | 10.13.6 |
| macOS Sierra | 10.12.6 |
| OS X El Capitan | 10.11.6 |
| OS X Yosemite | 10.10.5 |
| OS X Mavericks | 10.9.5 |
| OS X Mountain Lion | 10.8.5 |
| OS X Lion | 10.7.5 |
| Mac OS X Snow Leopard | 10.6.8 |
| Mac OS X Leopard | 10.5.8 |
| Mac OS X Tiger | 10.4.11 |
| Mac OS X Panther | 10.3.9 |
| Mac OS X Jaguar | 10.2.8 |
| Mac OS X Puma | 10.1.5 |
| Mac OS X Cheetah | 10.0.4 |
The System Information app provides detailed specifications and other information about your Mac hardware and software, including your network and external devices. In some versions of OS X, this app is called System Profiler.
Choose Apple menu > About This Mac. This opens an overview of your Mac, including your Mac model, processor, memory, serial number, and version of macOS. To see the greater detail provided by the System Information app, click the System Report button.
To open System Information directly, press and hold the Option key and choose Apple menu > System Information. You can also use Spotlight to find System Information, or open it from the Utilities folder of your Applications folder.
System Information opens to a system report for your Mac:
Select items in the sidebar to see information about each item. For example:
- The Hardware section shows your Mac serial number
- The Memory section shows how much RAM is installed in each internal memory slot.
- The Software section shows which startup disk (boot volume) your Mac is using.
- The Network section shows details such as your IP address, the connections allowed by your macOS firewall, the signal strength of nearby Wi-Fi networks, and more.
Learn more
Mac System Report
- To have System Information read your serial number aloud, choose File > Speak Serial Number.
- To save a copy of your system report, choose File > Save.
- To learn more about System Information, choose Help > System Information Help.