This is an option available to those users who have the macOS Sierra version installed right now or directly have the installer on a USB already created. As of today, as we write this article, the new version of macOS High Sierra has just been released and it is possible that many users do not have the Mac updated, in this case it is important to create this installable disk on a USB or external disk.
If you already have macOS High Sierra installed, the option that we show you today is to obtain the previous version of the operating system, macOS Sierra. To perform the downgrade there are more options but the most recommended and reliable is create this bootable USB from a Mac that has macOS Sierra installedas it will be a reliable and authentic version. It doesn't matter if it's from an iMac, Mac mini or MacBook, they all work the same.
On the internet we can also find this version of Apple's operating system or we can even downgrade from an old Time Machine copy, but it is best to access directly from a Mac and create the installer. It is actually something that many users have if we perform a zero installation in each version presented at WWDC since it is necessary to create this USB, this one works for us perfectly.
Steps to follow to return to macOS Sierra
The initial step is the usual one: backup to Time Machine or similar to avoid problems in case of failure. This is the first step in all cases and it is that without this copy then come the problems of data loss, etc.
Now we have to create the macOS Sierra installer That can easily be done using a minimum 8GB USB. To do this we can follow these steps that are almost the same as to create the macOS High Sierra installer and perform a zero installation:
- When we have macOS Sierra in the Mac we insert the USB of 8GB or more
- We format and rename the USB to "Untitled"
- We open Terminal and paste the following code: sudo / Applications / Install \ macOS \ Sierra.app/Contents/Resources/createinstallmedia –volume / Volumes / Untitled –applicationpath / Applications / Install \ macOS \ Sierra.app –nointeraction
- We enter the user password and wait for it to finish
When this process is finished (it will take a bit depending on the Mac and USB speed) all we have to do is format the disk on which we have the macOS High Sierra operating system installed from Disk Utility and that's it. Now it's our turn install from USB and for this what we have to do is turn off the Mac and with the USB connected to the computer when it turns on press Alt, We choose the USB to install macOS Sierra and when it finishes we will have Sierra again on the Mac.
It is advisable to use macOS High Sierra since the differences between both systems are few and we will not notice improvement when downloading the version, but we leave this in your hands.