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Command (⌘)-R. Install the latest macOS that was installed on your Mac. Option-⌘-R. Upgrade to the latest macOS compatible with your Mac. Shift-Option-⌘-R. Install the macOS that came with your Mac, or the closest version still available. I was trying to reinstall macOS Sierra. When it was about to finish it shown me " About - 404 seconds ...
Open Safari and click on this link, How to get old versions of macOS – Apple Support. Go to Check Compatibility to see if your mac qualifies for the OS upgrade you want. Then go to the Download OS section and click on the OS you want to install. Before upgrading make a full back up of your Mac.
Get macOS install files on a computer. Use the App store (recommended) Download 'Install macOS High Sierra.app' from App Store. Run installer, which downloads installer files, stop installer when it asks to restart. The files are now located in /macOS\ Install\ Data. Download files manually.
Reinstall High Sierra macOS does not work (recovery server could not be contacted) I have a Macbook Pro Mid 2010 which only a few days ago, would not start past the apple logo. So I went on several help threads on the internet, went on recovery mode, ran repair and first aid on my disks, before eventually just deciding to erase my drive.
create a bootable USB installer on hat mac. Open Safari and click on this link, How to get old versions of macOS - Apple Support. Go to Use Safari to download macOS to your mac. Click on macOS Sierra. This will download InstallOS.dmg to the Downloads folder. Double-click InstallOS.dmg to get the InstallOS.pkg.
On an Intel-based Mac that previously used macOS Sierra 10.12.4 or later, you can use Shift-Option-Command-R at startup to install the macOS that came with your Mac, or the closest version still available. If the above still fails to resolve the issue, you may try creating a bootable installer for macOS using another Mac if necessary.
Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.) Click on the Apply button, then wait for the Done button to activate and click on it. Quit Disk Utility and return to the Utility Menu. Select Install OS X and click on the Continue button. This will install the version of OS X you had installed.
If you already have the Install macOS High Sierra.app application bundle, then the easiest way to install macOS is to create a macOS USB Installer and boot the Mac with it and install from there. Have a look at: How to create a bootable installer for macOS
sudo chown joeuser:staff Install\ macOS\ Sierra.vmdk. Using the VirtualBox GUI, select the desired VM, click Settings, click Storage, click Add Hard Disk button, select Choose existing drive, and then select the VMDK file you just created. Boot your VM. VirtualBox will automatically find the bootable volume and begin the installation process.
Click on the Apply button, then click on the Done button when it activates. Quit Disk Utility and return to the Utility Menu. Select Install OS X and click on the Continue button. Internet/Network Recovery of El Capitan or Later on a Clean Disk. If possible, back up your files before proceeding. Restart the computer.