Is your Mac up to date with the latest version of the Mac operating system? Is it using the version required by a product that you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, learn which version is installed now.

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Mac OS, operating system (OS) developed by the American computer company Apple Inc. The OS was introduced in 1984 to run the company’s Macintosh line of personal computers (PCs). The Macintosh heralded the era of graphical user interface (GUI) systems, and it inspired Microsoft Corporation to develop its own GUI, the Windows OS. Mac OS X launched on March 24, 2001. The 1990s were rough for Apple. Until 1997, when Steve Jobs took the helm again, the company attempted to right itself by creating a plethora of CE products.

If your macOS isn't up to date, you may be able to update to a later version.

Which macOS version is installed?

Mac Os X 10 8 free download - Apple Mac OS X Snow Leopard, R for Mac OS X, Apple Mac OS X Lion 10.7.5 Supplemental Update, and many more programs. After a few seconds the “Avg Energy Impact” column is populated with values and the title bar changes to “Activity Monitor (Applications in last 8 hours)”. If you have top open during those 5–10 seconds can you see that systemstats is running and using a lot of CPU, and so presumably the measurements are obtained from it. I unzipped the '8.6-hacked-Mac OS ROM.zip' on Tiger(OS X 10.4) to get a Mac OS ROM correctly. Its icon is not blank this time. I could skip the OF process and boot the Mac OS 8.6. However, there occurred a power off after the icon parade again. I tested Mac OS 8.6(Japanese version) and obtained the same results.

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?

These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Big Sur. As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS.

If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos.

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AppleCare products provide additional hardware service options and expert technical support from Apple.

Beware of counterfeit parts

Some counterfeit and third party power adapters and batteries may not be designed properly and could result in safety issues. To ensure you receive a genuine Apple battery during a battery replacement, we recommend visiting an Apple Store or Apple Authorized Service Provider. If you need a replacement adapter to charge your Apple device, we recommend getting an Apple power adapter.

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Also non-genuine replacement displays may have compromised visual quality and may fail to work correctly. Apple-certified screen repairs are performed by trusted experts who use genuine Apple parts.

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