macOS Mojave 10.14： System Requirements.

macOS Catalina 10.15： System Requirements.

In most cases, macOS installers are kept in the Application folder.īefore downloading the macOS installer you want, check if your Mac is compatible with it.

If the Scheme is available, select GUID Partition Map. To check which format your Mac is using, open the Terminal app and type and run the command: diskutil info /.

If your Mac uses HFS+, choose Mac OS Extended (Journaled).

Name your drive as MyVolume or whatever you like 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. (If you've already formatted the external drive, skip to Part 2.) There might be other files in your drive. Although the macOS installer is about 12GB, you'll still need some extra space to store your 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. We'll show you how to install a downgraded macOS using a bootable installer. What if you don't have a Time Machine backup but still want to revert to an earlier macOS? Do not worry. How to Downgrade macOS Ventura Using a Bootable Installer It is recommended that you back up your Mac before reverting to an old macOS.

The above steps are only applicable to Intel-based Macs.

Follow the onscreen instructions to reinstall macOS.

Option-Command-R: Install the latest macOS compatible with your Mac.

Shift-Option-Command-R: Install macOS that came with your Mac, or the closest version still available.

Command-R: Reinstall the current macOS.

Press the Power button, then immediately press one of the key combinations:.Or, you can even revert to the macOS that came with your Mac. It allows you to reinstall your current macOS (Ventura). How to Downgrade macOS Ventura with macOS RecoveryĪlternatively, you can use macOS Recovery to downgrade your macOS. Follow the onscreen instructions to install macOS.

Select your Time Machine backup and click Continue.

In the macOS Utilities window, select Restore from Time Machine Backup and click the Continue button.

(On Apple Silicon Macs, press the Power button.)

Restart your Mac and immediately press and hold Command-R to enter macOS Recovery Mode.

Insert the drive with the Time Machine backup file.

The easiest way to downgrade macOS is to use a Time Machine backup you created on your old macOS. How to Downgrade macOS Ventura Using Time Machine Backup If you backed up things that are important to you, you can quickly restore them after reinstalling macOS. When you reinstall macOS, all data on your Mac will be wiped. Important things first, be sure to back up your Mac. How to Delete System Data Storage on Mac Back up Your Mac

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