Here's a simple guideline on how to downgrade from macOS 10.13 High Sierra to macOS 10.12 Sierra. The company no longer releases security updates for computers running macOS 10.13 High Sierra and macOS Sierra.īut, if you've updated your Mac to macOS High Sierra and now want to downgrade to Sierra, there is a way. Apple releases new operating systems every year, and that's why they phase out software support for older macOS versions when the new macOS arrives. When it was released in 2017, macOS High Sierra introduced changes to the Apple File System and a bunch of improvements to Safari and other pre-installed apps. But to help you do it all by yourself, we’ve gathered our best ideas and solutions below.įeatures described in this article refer to the MacPaw site version of CleanMyMac X. Below you can see how much time you should plan on for each of the main steps that you need to take to install High Sierra.So here’s a tip for you: Download CleanMyMac to quickly solve some of the issues mentioned in this article. If not, that could take a long time to complete. One of the biggest factors will be if you are prepared for the macOS High Sierra update with a Time Machine backup. We can help outline the most likely time you need to complete the upgrade. We don’t know exactly how long your macOS High Sierra update will take since download times will vary based on your Internet connection and based on your device. Plan to set aside a little bit of time for this update, during which you cannot use your computer. If you are already on macOS High Sierra and just need to install the latest release like macOS 10.13.5, it will take at least 20 minutes to install. It will take longer to upgrade from macOS Sierra to macOS High Sierra. One of the most common questions is, “how long does the macOS High Sierra update take to finish?” The macOS High Sierra update is large, and you may see an even larger update size if you are not coming from macOS Sierra. The new macOS 10.13.5 update is smaller and more focused, but it still takes a while to install. If you’re prepared, the new upgrade shouldn’t take too long to install on your MacBook, MacBook Air, iMac, MacBook Pro or other Mac.Īpple’s High Sierra update first arrived in late 2017 with plenty of new features for your Mac. The macOS High Sierra update is big, but the longest part of the upgrade is the installation for most users.
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