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Title:Big Sur Downgrade to Mojave
Duration:34:08
Viewed:34,415
Published:28-12-2020
Source:Youtube

How to downgrade macOS Big Sur to macOS Mojave (or Catalina, High Sierra, etc.) From backup to restore without spending money, to restore. I walk through the downgrade process, highlighting new problems along the way that are specific to Big Sur. 00:00 Introduction and what you need 02:38 If you have TouchID, delete your fingerprint 03:00 Turn off Find My Mac and sign out of iCloud 03:47 Export data out of Apple Photos, Notes, etc. 04:23 Prepare our backup drive 06:40 How to open and setup Terminal for backup 10:54 Backup our home directory with cp 12:55 Backup/update our backup with ditto 13:57 Download the macOS installer app of your choice 15:14 How to create a macOS bootable USB installer 16:09 Handling the "too old to be opened" error message 16:47 Create our macOS USB installer on our backup drive 20:23 Restart in Big Sur's Recovery Mode 21:25 If you have a T2 chip we must change Startup Security settings 22:40 Erase our drive with Disk Utility, but in a special way 24:11 T2 Chip owners shut down, others restart with option key 25:04 Erase our drive with Disk Utility again 25:46 How to erase the drive with Terminal if Disk Utility failed 26:57 Run the installer 27:01 Setup 27:47 Caution about copying files with Finder 28:20 Restoring from our backup, manually 29:03 Restoring items from the hidden Library folder 31:39 Repair home directory permissions to avoid problems 33:16 Install software or download it and install 33:36 Conclusion How to get old versions of macOS support.apple.com/en-ca/HT211683 How to create a bootable installer for macOS support.apple.com/en-ca/HT201372

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