Restore Time Machine backup from Sierra to El Capitan
31268
Revert to El Capitan
132058
Back up and restore file permissions
18291
Is there any way to restore/recover the previous version of a file that was saved over?
109386
How do I create El Capitan installer on a Catalina (or post-El Capitan) installed Mac for use on USB boot installer
54472
How to reinstall macOS Sierra after formatting by Ubuntu
56055
Simple Backup Solution
105757
How to restore file copy / transfer status window?
46084
Can I downgrade from macOS Sierra to Snow Leopard (OS X 10.6)?
36892
Upgrading from Yosemite to El Capitan, but not Sierra
100522
Does Time Machine backup programs like Photoshop and iWork?
82633
How can I delete Time Machine backups, moved into trash?
110159
What is a good OSX incremental backup software (not time machine)
43279
Alternative Method to Acquire El Capitan Upgrade
135547
Downgrading from OS X 10.9.2 to 10.9
7713
How do I take a backup of my Master Boot Record (MBR) and Partition Table (PT)?
15536
Restoring a backup to an older version of SQL Server
151446
how to quickly reboot from OSX to Windows and back