Users increase use the combination of keys Command (⌘)-R to start Mac in ”Recovery Mode" Disk Utility, Terminal and to the module of installation / reinstallation of maccos operating system.
Few know they can use Two other key combinations for entering Macos Recovery. These combinations help users choose Another version of the maccos operating system. For example, if you have Macos Catalina installed in beta version and want to return to Macos Mojave, the key combination Command (⌘)-R, will not help you too much.
Command (⌘)-R It will reinstall the latest version of maccos previously present on Mac. That is, if you have Macos Catalina, in Macos Recovery you will find the same version available for reinstallation.
If you hold the key combination Option-Command(⌘)-R When starting Mac, it will automatically enter ”Internet Recovery"And will provide the latest final version of macos Available for your device requires internet connection and a waiting time until the installation image is downloaded. In our scenario, entering Macos Recovery with the key combination Option-Command(⌘)-R will install macOS Mojave. This being the final version of the final at the time of our tutorial.
For the nostalgic, there is also the combination of keys Shift-Option-Command (⌘)-R. With this combination of keys, it will enter the "Internet Recovery" and will provide the maccos version with which your device came with. Basically the operating system available on the device in the moment when it was removed from the box. On a MacBook Pro 13-Inch (Mid. 2012) has been provided to us OS X Mountain Lion. If you have a very old Mac, the operating system may no longer be available, and in this case, the Shift-Option-⌘-R will install the oldest available version.
A short recap. On Mac we have three variants of "recovery mode", each of them offering the opportunity to install a certain version of macos.
- Command (⌘)-R - reinstalls the Macos version Presented previously on the macos.
- Option-Command(⌘)-R - installs the latest final version of maccos (requires internet connection)
- Shift-Option-Command (⌘)-R - installs the maccos version with which Mac came. If this is no longer available, the next version will be installed. Internet connection is required.
Before reinstalling maccos, it is good to back up all the data stored on it and format the disk or installation partition, using Disk Utility.
