Start up from macOS Recovery

• MacOS – 2012 MacBook Pro OS X El Capitan wont boot into windows 8.1 after a HD partition change bootcamp macos partition I had windows 8.1 installed with bootcamp and it was running fine but I ran out of space on the partition I originally created.
• OS X El Capitan - Failed to install due to encryption You’re now watching this thread and will receive emails when there’s activity. Click again to stop watching or visit your profile/homepage to manage your watched threads.
• Once the Mac is connected to the internet, from the OS X Utilities screen choose “Reinstall OS X”. Select the target hard drive to re-install OS X onto (typically “Macintosh HD” but varies per user) – if the Mac has a FileVault password set choose to “Unlock” and enter the FileVault encryption password before proceeding further.
• If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first. If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD. Allow installation to complete without putting your Mac to sleep or closing its lid.

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.

Intel processor

When I choose the Mac OS HDD it gets to the install portion where it asks for an apple ID. I enter it and then it says 'this item is temporarily unavailable' with an App store logo next it. I have created a USB with El Capitan on it and an SD card with EL Capitan on it.

Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.

If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.

Reinstall macOS

Os X El Capitan Cannot Be Installed On Macintosh Hd Hard Drive

Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.

Follow these guidelines during installation:

El Capitan Os X Download

• If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
• If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
• If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
• Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.

After installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.

Other macOS installation options

When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:

• On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
• If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.

You can also use these methods to install macOS, if the macOS is compatible with your Mac:

• Use the App Store to download and install the latest macOS.
• Use the App Store or a web browser to download and install an earlier macOS.
• Use a USB flash drive or other secondary volume to create a bootable installer.