So, If you skip this step, you wouldn’t be able to recover your data if something goes wrong. Note: A clean install of macOS Sierra on the startup drive completely erases all data on that drive: all your files and documents, including music, movies, pictures, and even apps. Now, you’ve got plenty of free space, and your Mac is free from system junk. Download CleanMyMac for free, launch it, click Scan, and then Clean. Junk removal with CleanMyMac takes only a few minutes. To make sure Sierra has no trouble installing and works fine after, you need to get rid of system junk on your Mac first. You could clean it up manually, but using a cleaning app like CleanMyMac X will save you hours on that. If you’re going to perform a clean install on the startup drive, you need to back up your data, create a bootable copy of the installer, and, finally, boot from the bootable installer.

Back up your Mac to ensure your personal data is intact.Ĭlean Install macOS Sierra on Your Mac’s Startup Drive.

But if you plan to clean install on a non-startup drive (you have an extra HDD or SSD on your Mac), you don’t need the USB. This flash drive is only needed for a clean install on your Mac’s startup drive.

Take a 16GB or larger USB flash drive to create a bootable Sierra installer.

Quit the macOS Sierra Installer app without performing the installation. Once the download completes, it will automatically launch.

Download macOS Sierra Installer from the Mac App Store.

Then, you should prepare your Mac for the installation: But if you like the idea of giving your Mac a fresh start with a new macOS and nothing else, a clean install is the right option for you.Īlso, in case you’ve noticed that with time your Mac is running slower, it has an unusual startup, or shutdown issues and crashes, a clean install may be a good way to get back the speed and fix the problem.įirst of all, make sure that your Mac is able to run macOS Sierra. It saves all your personal files, apps, and user data, while a so-called clean install of Sierra will erase all data on the startup drive and replace it with a clean copy of macOS. Note that getting an upgrade is the easiest way of installing the new macOS.

LEARN MORE: How to Clean Install the macOS High Sierra? It has plenty of new features and also has the same easy clean install and upgrade flow as did the previous OS. MacOS Sierra is a fantastic update arriving from Apple to make us love our Macs even more.

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. So here’s a tip for you: Download CleanMyMac to quickly solve some of the issues mentioned in this article.

How to make bootable sierra usb