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If you have a compatible Mac with a version of OS X that predates Lion (for example, Snow Leopard), you will need to download Sierra on another compatible Mac with Lion or later, create a bootable Sierra flash drive or external hard drive (using Apple’s official instructions or the third-party tool DiskMaker X), and do a clean install overwriting the hard drive on your Mac-so be sure to carefully back up all of your files first.Īn alternative solution for upgrading a compatible Mac from Snow Leopard to Sierra is to first upgrade to your choice of Lion through El Capitan (if you happen to have a bootable installer from one of those versions of macOS handy, or if you’re able to download one from the Purchased section of the App Store and use DiskMaker X to create a bootable installer), and then do a second upgrade from that macOS version to Sierra. Those who are unsure which Mac model they own may find EveryMac and apple-history to be useful sites. MacOS Sierra requires one of the following Macs with at least 2 GB of RAM, 8.8 GB of available storage space, and at least OS X Lion: If your Mac is older than the ones listed directly below, read on for suggestions about what you can do to upgrade to an operating system that’s still getting security patches. The good news is that most new Macs sold within the past several years can be upgraded to Sierra.įollowing is the list of Macs that can run Sierra, the current and best-supported version of macOS.
Apple has not previously responded to press inquiries about this subject.
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While Microsoft publicly announces its support timetables for Windows and other software, and the Ubuntu Linux company Canonical does likewise, Apple has never given any official notice regarding how long each version of macOS or iOS will continue to receive security updates.
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Keeping up with the latest macOS updates and using third-party antivirus and security software ( might we recommend some?) are important factors in keeping your Mac protected.Īpple does not make any public statements concerning how long it will continue to release XProtect updates, let alone security patches, for any particular Apple software or operating system. It’s important to note that XProtect updates, while better than nothing, are by themselves insufficient to adequately protect your Mac.
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The only security-related update that Apple is continuing to release for Snow Leopard through Mavericks is the XProtect “Safe Downloads List,” which blocks a handful of malicious downloads (although signatures are often added too late to be of much use) and prevents Flash and Java content from running in your browser-if your plug-ins are too outdated and likely to be exploited. For now, Flash and Java also officially support Mavericks and later.īrowsers and plugins are commonly exploited as a means of infecting computers, so it’s critical that these programs-along with the operating systems that run them-stay up to date. For example, the latest versions of Chrome and Firefox won’t run on anything older than Mavericks. Moreover, many third parties have stopped releasing software updates compatible with older operating systems. Some early Intel Macs released in 2006 are stuck with Snow Leopard (10.6), which hasn’t received security updates since the release of Mavericks three years ago.īeing stuck on an old version of macOS is not something you can safely ignore.įor one thing, running an old operating system means you won’t receive critical security updates from Apple. Some Mac models, such as 20 iMacs, are being left behind with El Capitan as their maximum OS version.Ĭertain older Mac models are still limited to Lion (10.7), which has not been getting security patches since Yosemite was released two years ago. In other words, just because your Mac was compatible with El Capitan (OS X 10.11), Yosemite (10.10), Mavericks (10.9), or Mountain Lion (10.8) may not necessarily mean that you’ll be able to upgrade to Sierra. With the release of Sierra, Apple decided to drop support for some Mac models that were supported by several previous releases of the Mac operating system.
High Sierra’s system requirements are the same, except that High Sierra now requires 14.3 GB of available disk space, and a minimum of OS X Mountain Lion (10.8) to do a direct-upgrade installation.Īpple recently released a new version of its Mac operating system, macOS Sierra (version 10.12). Note: Although this article was written for macOS Sierra (10.12), much of it still applies to macOS High Sierra (10.13) which was released in September 2017.
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Apple + How To + Recommended What to Do if Your Mac Can’t Run macOS Sierra
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