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What OS Version Are You Running? Here’s How to Find Out.

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In Troubleshooting 101, one of the first questions is always, “What version of the operating system are you running?” There’s a big difference between Mac OS X 10.6 Snow Leopard and macOS 10.13 High Sierra, and the solution to any particular problem will likely revolve around knowing what operating system is in play.

The same is true of Apple’s other operating systems: iOS, watchOS, and tvOS. And, although they aren’t quite in the same category, Apple’s AirPods and HomePod both have system software that can be updated as well.

For the next time you’re experiencing a problem, here’s how to find the version of each of Apple’s operating systems.

macOS

On the Mac, click the Apple menu in the upper-left corner of the screen and choose About This Mac. A window opens, displaying the name (macOS High Sierra shown here) and version (10.13.4) of the running version of macOS.

Every now and then, it can be important to learn the build number too—it’s one step more specific than the version number. A new Mac may have a different build number of the same version of macOS, for instance, or Apple may push out a silent security update that changes the build number. To find the build number, simply click the version number—the six-character build number (17E202) appears in parentheses, as above.

iOS

On an iPhone, iPad, or iPod touch, you find the version number in Settings > General > About. Scan down the screen until you see the Version line, which tells you both the version of iOS and the build number.

watchOS

There are two ways to find the version of watchOS running on an Apple Watch:

  • On the watch, open the Settings app, scroll down to and tap General, tap About, and then scroll down until you see Version.
  • On your iPhone, open the Watch app and make sure My Watch is selected in the bottom button bar. Then go to General > About to see a screen that displays much the same information as the Settings app on the watch, including the version number.

tvOS

By now, you can probably guess that on an Apple TV you go to Settings > General > About to find the tvOS version. Apple is nicely consistent in this regard. That said, only the fourth-generation Apple TV and Apple TV 4K run tvOS. The obsolete second- and third-generation Apple TVs are instead based on a stripped-down version of iOS, and the first-generation Apple TV is an entirely different beast yet, with its large white case and internal hard drive.

AirPods

You’re unlikely to need to check the version of your AirPods, but if it ever comes up, make sure the AirPods are either connected to their host iOS device or in their case with the top open. Then, on the host iOS device, go to Settings > General > About > AirPods and look for the Firmware Version line.

HomePod

Although the HomePod shipped only recently, Apple has promised software updates that will allow two HomePods in a room to provide true stereo sound and support multi-room audio if you’ve sprinkled HomePods around your house. To check the version of the HomePod software, open Apple’s Home app, make sure Home is selected in the bottom toolbar, and then press and hold on the HomePod’s tile until it opens. Then tap the Details button in the lower right and scroll down until you see the Version line.

Social Media: Quick! Can you find the current operating system version for all your Apple devices? Learn how to carry out this essential troubleshooting task—it’s easy!

Install Minor Operating System Updates to Maintain Herd Immunity

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It seems like Apple releases updates to iOS, macOS, watchOS, and tvOS nearly every week these days. It has been only a few months since iOS 11 and macOS 10.13 High Sierra launched, and we’ve already seen ten updates to iOS and seven updates to macOS. Some of these have been to fix bugs, which is great, but quite a few have been prompted by the need for Apple to address security vulnerabilities.

Have you installed all these updates, or have you been procrastinating, tapping that Later link on the iPhone and rejecting your Mac’s notifications? We’re not criticizing—all too often those prompts come at inconvenient times, although iOS has gotten better about installing during the night, as long as you plug in your iPhone or iPad.

We know, security is dull. Or rather, security is dull as long as it’s present. Things get exciting—and not in a good way—when serious vulnerabilities come to light. That’s what happened in November 2017, when it was reported that anyone could gain admin access to any Mac running High Sierra by typing root for the username and leaving the password field blank. That one was so bad that Apple pushed Security Update 2017-001 to every affected Mac and rolled the fix into macOS 10.13.2.

Part of the problem with security vulnerabilities is that they can be astonishingly complex. You may have heard about the Meltdown and Spectre hardware vulnerabilities discovered in January 2018. They affect nearly all modern computers, regardless of operating system, because they take advantage of a design flaw in the microprocessors. Unfortunately, the bad guys—organized crime, government intelligence agencies, and the like—have the resources to understand and exploit these flaws.

But here’s the thing. Security is an arms race, with attackers trying to take advantage of vulnerabilities and operating system companies like Apple, Microsoft, and Google proactively working to block them with updates. If enough people install those updates quickly enough, the attackers will move on to the next vulnerability.

The moral of the story? Always install those minor updates. It’s not so much because you will definitely be targeted if you fail to stay up to date, but because if the Apple community as a whole ceases to be vigilant about upgrading, the dark forces on the Internet will start to see macOS and iOS as low-hanging fruit. As long as most people update relatively quickly, it’s not worthwhile for attackers to put a lot of resources into messing with Macs, iPhones, and iPads.

That said, before you install those updates, make sure to update your backups. It’s unusual for anything significant to go wrong during this sort of system upgrade, but having a fresh backup ensures that if anything does go amiss, you can easily get back to where you were before.