Select the macOS Sierra drive to continue. With your bootable USB drive inserted in your computer, restart your Mac, then hold the Option (alt) key down on your keyboard until the Startup Manager appears. That way, you can play around with Sierra and easily switch back to El Capitan if you end up not liking the new operating system.

Since this is the first version of the public release of macOS Sierra, you might want to create a separate partition on your Mac and install Sierra as a dual boot system with Mac OS X El Capitan. Also, you'll need OS X 10.75 or later, 2 GB of memory, and at least 8.8 GB of available storage to upgrade your computer. Most devices are supported, but just in case, check out the basic list of Macs you can install Sierra on below (for features requirements, see here). Now that you're all set, it's time to install Sierra on your computer. Step 6: Install macOS Sierra on Your Computer So, close out of the installation screen that pops up, if any. If you do, it will auto-erase the file when your system gets back up and running, which means you won't have the file for your USB drive. Step 1: Download the macOS 10.12 Installerĭownload the new macOS 10.12 Sierra from the Mac App Store-but don't install it when it finishes downloading. So downloading it once and making a bootable USB stick is an easier, faster way to go. The download for macOS Sierra is about 5 GB, and could take some time downloading on each computer individually.

If you have multiple computers that need the macOS Sierra upgrade, you'll want to create a bootable install flash drive. You can also use Apple Pay in Safari, unlock your Mac with your Apple Watch, keep all your Mac's desktops and documents in sync, and use all the cool new iMessage features that iOS 10 already sports, among other things. Another great one is the ability to copy/paste between your iOS 10 device and Mac. Siri is definitely the most tempting feature in macOS Sierra, which is more powerful than its iOS equivalent. While it hasn't gotten as much attention as iOS 10, Apple's big 10.12 update to their Mac operating system is finally out for all to enjoy-and you can download it for free from the Mac App Store right now.

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