Reinstall macos big sur mac#

Press the Power button to start Mac and immediately Press and Hold Command + R keys. If your MacBook is equipped with Intel-based processor, you can follow the steps below to Reinstall macOS.Ģ. Reinstall macOS on MacBook with Intel Processor Follow the next onscreen instructions and patiently wait for macOS installation process to be completed. On the next screen, select Reinstall macOS option and click on Continue.ĥ. Select Language and click on the Next Arrow. Wait for all macOS Recovery icons to appear on the screen and click on Options to enter Recovery Mode.Ĥ. Release the Power button, when you see a message reading “Loading Startup Options” on the screen of your computer.ģ. Press and Hold the Power button to start Mac and continue holding the Power button as Mac starts with Apple Logo. If your MacBook has Apple M1 Processor, you can follow the steps below to Reinstall macOS.Ģ. Reinstall macOS on MacBook with Apple M1 Chip Note: If Formatting the Disk is required, make sure that you make a Time Machine Backup of your Mac. You will find your computer restarting and showing the progress bar multiple times. Make sure that you do not close the lid, put your Mac to sleep or interrupt the installation process in any way.

Reinstall macos big sur install#

Password: Enter the Password that you use to login to your computer.ĭisk/Volume: Select Macintosh HD, if the installer prompts you to select the target installation disk or volume.įormat Hard Disk: You may need to Format the Hard Disk, if you see a message reading “ can’t install macOS” or if the Hard Disk does not show up. In the right-pane, you will be able see if your Mac is equipped with Apple T2 Chip.ĭuring the installation process you may be prompted to enter password and select the target installation volume or disk (Macintosh HD or Macintosh HD-Data) On the next screen, click on Controller in the left-pane. To check if Apple T2 Security Chip is installed on your Mac, click on Apple Logo > About This Mac > System Information.

This also applies to third-party content accessible via this offer.To check the type of Processor installed on your Mac, click on Apple Logo in top-menu bar and select About This Mac option in the drop-down menu. No liability is assumed for damages resulting from the use of this script or the information drawn from it. The published information has been carefully compiled, but does not claim to be up-to-date, complete or correct.

Reinstall macos big sur code#

The source code of the script is also in my GitHub repo Script running with a local InstallAssitant.pkg on /Volumes/macOSCache You can also build this service yourself/statically. For this purpose I have built a small service that provides me with the current URL for the InstallAssitant.pkg and the ist. In this script, two additional parameters are retrieved. (I recommend to use the new built-in erase functions in system preferences if you have access to the system) But this also saves you an enormous amount of time. Currently, the eraseinstall command does not work in option mode, so only the installer is loaded and you have to start the installation manually. T his script will also work with the new Apple Silicon ARM64 (M1) generation but there is a limitation in recovery mode.

Reinstall macos big sur update#

Ask for update the cached installer if it exists.Save installer on cache disk if the disk exists.I compare the latest server version with the local version.After installation the Install macOS Monterey.app i check the version.

Use the installer from the cache disk if exists.

Check if a cache disk exist named “macOSCache”.

Check if the user is authorised for the installation.

The result is that I have opted for a combined solution with a server side script. Therefore I decided to solve the problem on the server side, only to discover that the server-side cache of 12 GB is not particularly practical, especially in the mobile office.

Reinstall macos big sur download#

To prevent the 12 GB download every time i cached the installer on an external disk.Īfter only a few days I realised that the installer is already outdated again and that this idea requires a lot of effort, especially if you have prepared several cache disks. In the last few weeks I had to install macOS several times and delete my test devices again. MacOS easy-erase works now on macOS Monterey and support M1 & Intel #macos #monterey #eraseinstall #deployment #dep- Michael R November 2, 2021