How To Download Macos From Recovery Mode. If you want to learn how to reinstall Mac OS using Recovery Mode we cover that in a separate. Recovery Mode mounts a recovery system image with the recovery tools from a hidden recovery partition on your startup disk.
Open Startup Security Utility Turn on your Mac then press and hold Command -R immediately after you see the Apple logo. Allow installation to complete without putting your Mac to sleep or closing its lid. MacOS Recovery installs different versions of macOS depending on the key combination you use while starting up.
The tool allows you to create OS X Recovery on an external drive that has all of the same capabilities as the built-in OS X Recovery.
First introduced in 2011 with macOS Lion recovery mode gives users more control over macOS reinstallation. Rarely you may need to boot a Mac into Recovery Mode. Select Reinstall macOS from the utilities window in macOS Recovery and then click Continue and follow the installers instructions. If your Mac cannot be recovered in any other way use Recovery Mode to diagnose disk problems get help online or install the version of macOS that previously ran on this.