Need to downgrade your Mac OS? Here are 3 ways to do it.
SUBSCRIBE & HIT THE 🔔
00:26 Backup User Folder
00:44 Time Machine Downgrade
01:26 Recovery Partition Downgrade
02:34 Create Bootable USB Drive with Desired macOS for Downgrade
04:23 Modify T2 Mac Security To Allow for External Disk Booting
05:10 Reboot to Bootable USB Drive
05:33 Open Disk Utility and Wipe Drive
06:10 Install MacOS
06:50 Copy Back User Files
OPTION 1: Time Machine Backup Downgrade
You Have a Time Machine Backup of the Previous macOS you want to go back to. Please Note: You must manually backup all new files you created on Big Sur to an external drive before proceeding with a Time Machine Restore.
How to Restore with Time Machine Backup with Previous MacOS:
1. Reboot into Recovery by holding Command + R on Startup
2. Choose Time Machine Backup and Select the Backup to restore from.
OPTION 2: Recovery Partition Downgrade
Boot to Recovery Partition – Options Below:
Command + R
Reinstall the latest macOS that was installed on your Mac (recommended).
Option + Command + R
Upgrade to the latest macOS that is compatible with your Mac.
Shift + Option + Command + R
Reinstall the macOS that came with your Mac, or the closest version still available.
OPTION 3: Create Bootable USB Drive with Desired macOS Downgrade
You have no Time Machine Backup. Copy User Files off to an external drive. Please Note: All Apps and Files will be wiped with this process, so make sure to backup what you can.
1. Make note of all your Apps (Take A Pic of Apps Folder) and Copy any Serial Numbers or Required Info from within the App.
2. Copy whole User Folder to External Drive. Some Apps can be copied this way as well, but I prefer to reinstall all apps.
3. Download the MacOS you want to go back to.
4. Create Bootable macOS Installer Media.
5. Reboot into Recovery by holding Command + R on Startup
* T2 Macs will require modifying the Security to allow booting to older macOS.
6. Boot to External Drive – Choose Disk Utility and Wipe the Root Drive
7. Install macOS Catalina
8. Restore User Files and ReInstall Apps
How to Downgrade from Big Sur to Catalina
Catalina – App Store Download Link
Mojave – App Store Download Link
High Sierra – App Store Download Link
Sierra – DMG Download Link
El Capitan – DMG Download Link
Yosemite – DMG Download Link
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