Instructions: Boot Mac in Internet Recovery Mode

Booting the Mac in Internet recovery mode has the advantage that the computer is then supplied with an operating system downloaded from the Apple server. This can be just as useful on an old Mac, iMac, and MacBook as it is on a recent model that has had memory corruption and cannot get to the internal recovery partition. If the data on the hard drive is muddy and you cannot reinstall macOS from it, then try the Internet recovery mode. Here's how to do it. Important right from the start: there must be an internet connection (via cable or WLAN).

Instructions: Boot Mac in Internet Recovery Mode, explained step by step. Which macOS / OS X will be installed? Is that also possible via WLAN? Here you get all the answers;)

Instructions: Boot Mac in Internet Recovery Mode, explained step by step. Which macOS / OS X will be installed? Is that also possible via WLAN? Here you get all the answers;)

Internet Recovery Mode: Brief instructions

For all the impatient, here are the instructions for booting a Mac into Internet recovery mode in just 5 steps. A more detailed version of it as well as a preview of which operating system will be installed by the procedure can be found below.

  1. Start Mac and immediately hold down cmd + alt + R
  2. Release the buttons when the Apple logo appears
  3. If there is no LAN connection, establish a WLAN connection
  4. After downloading the data, select Reinstall (reinstall macOS) in the utilities
  5. Wait for another download and carry out the installation

On Mac restart: Recovery keyboard shortcuts

Preview: Which macOS will be installed?

With the procedure described, the operating system (Mac OS X, macOS) that you last used on it is not necessarily installed on the Mac. Apple gives this information on the Support page on the subject of "reinstalling macOS":

  • If macOS Sierra 10.12.4 or later has never been installed, you can get the macOS that came with your Mac or the next available version.

  • If your Mac has the Apple T2 Security Chip and you've never installed a macOS update, you will get the latest macOS that was installed on your Mac.

  • If your Mac's motherboard was recently replaced as part of a repair, macOS Recovery may only offer the latest macOS that is compatible with your Mac. If you've erased your entire hard drive instead of the startup disk on that hard drive, macOS Recovery may only offer the macOS that came with your Mac or the next available version.

Instructions: Start Mac in Internet recovery mode

To start the Mac in Internet Recovery Mode, hold down the cmd (command) + alt (option) + R keys immediately after switching it on. As soon as the Apple logo appears, you can let go of it again. If there is no LAN connection to the router, you have to select a WLAN network and enter the associated password. Then a rotating globe and a loading bar appear. 

This indicates that data is being downloaded from the Internet. Then the Internet Recovery Mode appears with the window “macOS Utilities” or “OS X Utilities” - there you select “Install macOS again” or “Reinstall OS X”. Data is then loaded again from the Internet, which can take some time. Once the download is complete, the downloaded Mac operating system can be installed. Finished.

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