The version of Mac OS X 10.6.0 raised the optimization to Intel-based processors further, the new operating system is no longer available for PowerPC Macintosh or pure 32-bit intel processors. In return the user receives a pure 64-bit operating system optimized for performance on multiple processors. Apple’s next Mac operating system, MacOS High Sierra, is here. As with past OS X and MacOS releases, MacOS High Sierra is a free update and available via the Mac App Store. Learn if your Mac is compatible with MacOS High Sierra and, if so, how to prepare it before downloading and installing the update.
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. Twitter for the mac. For example, the Hardware section shows your Mac serial number, the Memory section shows how much RAM is installed in each internal memory slot, and the Software section shows which startup disk (boot volume) your Mac is using. You can use the Network section and Network Utility to learn more about your network.
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.
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If you try to start up your Mac from a hard disk, network volume, or Time Machine backup that contains an incompatible version or build of macOS, you might experience one or more of these symptoms:
- Your Mac doesn't finish starting up, or displays a prohibitory symbol at startup.
- You see a message that you're using an unsupported or incorrect version of the Mac operating system.
- Your Mac doesn't respond to your trackpad, mouse, or keyboard.
- Apps unexpectedly quit.
- Your Mac doesn't sleep or wake.
- You don't hear any sound from your Mac.
- The fans in your Mac are louder, because they're spinning faster.
- The image on your display appears to shrink, has black bars around it, or appears tinted.
- You can't use Bluetooth or Wi-Fi.
Which Mac operating systems are compatible?
The version of macOS that came with your Mac is the earliest version compatible with that Mac. To find out whether your Mac is compatible with a later version of macOS, check the system requirements:
If your Mac won't start up from a compatible version of macOS, it might require a specific build of that version. To get the correct build, reinstall macOS or upgrade to a later version of macOS.
Learn more
Mac Os Versions List
- To restore a Time Machine backup that was created on a different Mac, use Migration Assistant.