#HOW TO DOWNGRADE MAC OS HIGH SIERRA TO SIERRA HOW TO#
How to Erase macOS 10.13 & Restore to Previous macOS? If you just want to keep some important files, you can simply select the items in Finder, and drag them onto an external storage device to make copies for later use. Time Machine will format the external disk and start backing up. As Time Machine launches, turn the slider from Off to On, click Select Backup disk button and choose the disk. To backup with Time Machine, connect an external hard disk to your Mac, then head to Apple menu > System Preferences and select Time Machine icon. Pre-preparation: Back up your Mac (if necessary) Beside, you may want to make another Time Machine backup on macOS High Sierra to keep the files you created or modified after the installation of macOS 10.13 beta. To restore your personal files, apps and settings, you will need the Time Machine backup that you created before you installed the public beta. First of all, make sure to connect your Mac to power as it will take some time to complete the process. This post will show you how to downgrade macOS High Sierra (both the developer and public betas) to macOS Sierra. If you have installed the latest beta of macOS 10.13, and later you would like to roll macOS High Sierra beta back to the more stable macOS Sierra, well, you can easily restore the previous system. That’s why it is not recommended to install a beta on a primary device.
![how to downgrade mac os high sierra to sierra how to downgrade mac os high sierra to sierra](https://cdn.osxdaily.com/wp-content/uploads/2017/07/downgrade-macos-high-sierra-beta-sierra-610x293.jpg)
Betas are usually unstable and have some bugs. In previous posts we discussed how to download and install macOS High Sierra developer beta as well as public beta.