Added initial port of original OSX project.

- This is a copy of the [OSX](https://github.com/bkuhlmann/osx) project
  originally released on 2012-03-31. The OSX project has been
  deprecated. All future development and support will take place with
  this project instead.
- This project uses the *macOS* name in order to better match the
  updated branding and terminology used by Apple.

bin/create_boot_disk

@@ -0,0 +1,36 @@
+#! /bin/bash
+
+# DESCRIPTION
+# Creates macOS boot disk.
+
+# EXECUTION
+printf "macOS Boot Disk Tips\n"
+printf "  - Use a USB drive (8GB or higher is best).\n"
+printf "  - Use Disk Utility to format the USB drive (Use \"Untitled\" for the label).\n"
+printf "\nmacOS Boot Disk Usage:\n"
+printf "  1. Insert the USB boot disk into the machine to be upgraded.\n"
+printf "  2. Reboot the machine.\n"
+printf "  3. Hold down the OPTION key before the Apple logo appears.\n"
+printf "  4. Select the USB boot disk from the menu.\n"
+printf "  5. Format the machine's internal drive using Disk Utility.\n"
+printf "  6. Install the new operating system.\n"
+printf "\nmacOS Reinstall:\n"
+printf "  1. Click the Apple icon from the operating system main menu.\n"
+printf "  2. Select the \"Restart...\" menu option.\n"
+printf "  3. Hold down the COMMAND+R keys before the Apple logo appears.\n"
+printf "  4. Wait for the macOS installer to load from the recovery partition.\n"
+printf "  5. Use the dialog options to launch Disk Utility, reinstall the system, etc.\n"
+
+printf "\nCreating macOS boot disk...\n"
+
+if [[ ! -d "$MAC_OS_INSTALLER_PATH" ]]; then
+  printf "ERROR: macOS installer does not exist: $MAC_OS_INSTALLER_PATH. Use the App Store to download.\n"
+  exit 1
+fi
+
+if [[ ! -d "$MAC_OS_BOOT_DISK_PATH" ]]; then
+  printf "ERROR: Boot disk must be mounted at: $MAC_OS_BOOT_DISK_PATH.\n"
+  exit 1
+fi
+
+sudo "$MAC_OS_BOOT_DISK_CREATOR" --volume "$MAC_OS_BOOT_DISK_PATH" --applicationpath "$MAC_OS_INSTALLER_PATH" --nointeraction