Let's create your bootable installer.Ĭonnect your formatted hard drive to your Mac.Įnter and run a command like below.
Now you have prepared the external drive and macOS installer.
At this time, you can refer to this article.
#DOWNGRADE MAC OS SIERRA TO YOSEMITE DOWNLOAD#
If you want to downgrade to a version of macOS that you haven't downloaded before, you won't be able to download it in the Apple Store. If you have previously downloaded the version of macOS you are going to install, you just need to open the Apple Store and download it again. If the Scheme is available, select GUID Partition Map.Ĭlick the Erase button and then click Done. If your Mac uses HFS+, choose Mac OS Extended (Journaled).Name your drive as myVolume and choose a format your Mac supports from the Format drop-down menu. Select your drive in the sidebar and click the Erase button at the top of the window. There might be other files in your drive. So please make sure that your external drive has enough space. Although macOS is about 12GB in size, you still need some extra space to store data. You need an external drive of at least 14GB. To help you understand better, we've divided the steps into 4 main parts. This method is more complicated than the two methods mentioned above.
#DOWNGRADE MAC OS SIERRA TO YOSEMITE HOW TO#
We'll show you how to install a downgraded macOS by using a bootable installer. What if you don't have a Time Machine backup but still want to revert to an earlier version of macOS? Do not worry. How to Downgrade macOS Using a Bootable Installer After the reinstallation process is complete, restore the files you backed up.Select your Time Machine backup and click on Continue.In the macOS Utilities window, select Restore from a Time Machine backup and click the Continue button.Keep holding these two keys until you see the Apple logo or other image.Start your Mac and immediately hold down Command + R to start up from the built-in macOS Recovery system.
How to Downgrade macOS Using Time Machine BackupĪnother way to downgrade your macOS is to use Time Machine Backup, but only if you have already backed up your previous macOS with Time Machine. Your Mac will restart after the installation is complete.Select your startup disk and click Install.Click Continue and follow the instructions on the screen.On the macOS Utilities screen, select the Reinstall macOS option.Hold down the Shift + Option + Command + R until you see the macOS Utilities.You just need to make sure your Mac is connected to the network. If you are running High Sierra or a later version of macOS and want to downgrade it to the version that shipped with your Mac when you purchased it, you can quickly do it through Mac's built-in macOS Recovery feature. How to Downgrade to the macOS That Came with Your Mac If you have backed up the things that are important to you, you can restore them quickly after reinstalling macOS. When you reinstall a macOS, all the data on your Mac will be wiped out. Back up Your Macįirst things first, you should back up your Mac. In this article, we'll show you how to downgrade macOS Monterey to an earlier Big Sur, Catalina, Mojave, High Sierra, or Sierra in 3 ways. Installing a new version of macOS is easy, but downgrading is more complicated. Common reasons include incompatible software, too many bugs, and your Mac running slow.
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