Restore from Time Machine Backup: Time Machine copies all your files, OS, and settings, which you can then copy to an external hard drive and use it to restore your Mac’s data.Mac Recovery Mode comes with four main features: If you can’t recover your computer using other means, then Recovery Mode comes handy when diagnosing disk problems, installing the previous macOS that ran on your Mac, or getting help online. The recovery tools are loaded from a special disk partition holding a recovery image and copy of the macOS installer. Mac Recovery Mode is a special mode in macOS that loads native recovery tools that help you restore from a Time Machine backup, get help online, reinstall macOS, or erase a hard disk, and more.