Use a bootable macOS Sierra installer drive to perform a clean installation.Format the boot drive, which erases everything off of the Mac.Manually back up important files and data on your Mac with Time Machine and another backup method.Let’s get this on the table right now - a clean install isn’t something that a casual user might want to undertake. We suggest that you look for an easier solution than doing a clean install of macOS Sierra, but if all else fails, this will help fix many problems. Some issues people have run into include Wi-Fi dropping or being unusually slow, Macs booting to a black screen and getting stuck there, can’t shut down or reboot the Mac after upgrading, email issues, Spotlight issues, even individual apps that crash repeatedly. Most people are fortunate enough to never see these problems, but others aren’t so lucky. Like most major operating system upgrades, the standard macOS Sierra upgrade has seen its share of odd issues. Think of it as taking a new Mac right out of the box, with no corrupted system files or any apps and data, and then installing what you need on the machine.
Once that clean install of macOS Sierra is done, a previously-made backup of personal files is transferred back to the machine and apps are reinstalled. Related: Five of the Best Hidden Features of macOS SierraĪ clean install involves erasing the boot drive in your device - a hard drive, Fusion drive, or SSD - then installing the operating system onto that boot drive.
#Fresh install mac os sierra how to#
Today we’re going to look at how to do a clean install of macOS Sierra in case you’d like to try resolving problems that you’ve experienced since doing a standard installation, or if you’d like for your macOS Sierra upgrade to start with a clean machine. Sadly, that has resulted in some major issues for a handful of users.
#Fresh install mac os sierra update#
When most Mac owners upgrade their computers to a new operating system like macOS Sierra, the installation of the new OS is done with a standard install and update through the Mac App Store.
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