Added version release notes.

[Details](https://is.gd/mGVQIu).

Merry Christmas!

.ruby-version

@@ -1 +1 @@
-2.6.4
+2.7.0

CHANGES.md

@@ -1,3 +1,16 @@
+# 8.0.1 (2020-01-01)
+
+- Added Startup Security Utility to README.
+- Updated README screencast.
+- Updated to Ruby 2.7.0.
+- Refactored caffeinate machine function to process grep.
+
+# 8.0.0 (2019-10-12)
+
+- Updated to Rake 13.0.0.
+- Updated to Ruby 2.6.5.
+- Updated to macOS Catalina.
+
 # 7.2.1 (2019-09-01)
 
 - Updated README screencast tutorial.

Gemfile

@@ -2,5 +2,5 @@
 
 source "https://rubygems.org"
 
-gem "rake", "~> 12.0"
+gem "rake", "~> 13.0"
 gem "git-cop", "~> 3.5"

README.md

@@ -31,6 +31,7 @@ the two projects are meant to be used:
   - [Setup](#setup)
   - [Usage](#usage)
     - [Boot Disk](#boot-disk)
+    - [Startup Security Utility](#startup-security-utility)
     - [Customization](#customization)
   - [Troubleshooting](#troubleshooting)
   - [Versioning](#versioning)
@@ -60,11 +61,11 @@ the two projects are meant to be used:
 
 ## Screencast
 
-[![asciicast](https://asciinema.org/a/263059.svg)](https://asciinema.org/a/263059)
+[![asciicast](https://asciinema.org/a/278158.svg)](https://asciinema.org/a/278158)
 
 ## Requirements
 
-1. [macOS Mojave](https://www.apple.com/macos) (with latest software updates applied)
+1. [macOS Catalina](https://www.apple.com/macos/catalina) (with latest software updates applied)
 1. [Xcode](https://developer.apple.com/xcode) (with accepted license agreement)
 
 ## Setup
@@ -76,7 +77,7 @@ Current Version (stable):
 
     git clone https://github.com/bkuhlmann/mac_os.git
     cd mac_os
-    git checkout 7.2.1
+    git checkout 8.0.1
 
 Master Version (unstable):
 
@@ -154,6 +155,32 @@ documentation (provided here for reference):
       4. Wait for the macOS installer to load from the recovery partition.
       5. Use the dialog options to launch Disk Utility, reinstall the system, etc.
 
+Depending on your security settings, you might need to use the Startup Security Utility before using
+the Boot Disk (see below).
+
+### [Startup Security Utility](https://support.apple.com/en-us/HT208198)
+
+With newer hardware, you should be running with the Apple T2 Security Chip (found via  → About This
+Mac → Overview → System Report → Controller). In order to boot your machine using the Boot Disk,
+you'll need to *temporarily* disable the default security settings as follows:
+
+- Turn on or restart your Mac, then press and hold `COMMAND + R` immediately after seeing the Apple
+  logo.
+- Select Utilities → Startup Security Utility from the main menu.
+- Click "Turn Off Firmware Password".
+- Select "Secure Boot: No Security".
+- Select "External Boot: Allow booting from external media".
+- Quit the utility and restart the machine.
+
+You'll now be able to boot your system with the Boot Disk (see above).
+
+After the new operating system has been installed via the Boot Disk, *ensure you return to the
+Startup Security Utility and re-enable the following settings*:
+
+- Click "Turn On Firmware Password".
+- Select "Secure Boot: Full Security".
+- Select "External Boot: Disallow booting from external or removable media".
+
 ### Customization
 
 All executable scripts can be found in the `bin` folder:

bin/create_boot_disk

@@ -23,7 +23,7 @@ printf "  5. Use the dialog options to launch Disk Utility, reinstall the system
 printf "\nCreating macOS boot disk...\n"
 
 if [[ ! -e "$MAC_OS_BOOT_DISK_CREATOR" ]]; then
-  printf "ERROR: macOS installer does not exist: $MAC_OS_BOOT_DISK_CREATOR. Use App Store to download.\n"
+  printf "ERROR: macOS installer does not exist: $MAC_OS_BOOT_DISK_CREATOR. Use System Preferences → Software Update to download.\n"
   exit 1
 fi
 

lib/settings.sh

@@ -5,7 +5,7 @@ set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 
-export MAC_OS_BOOT_DISK_CREATOR="/Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia"
+export MAC_OS_BOOT_DISK_CREATOR="/Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia"
 export MAC_OS_BOOT_DISK_PATH="/Volumes/Untitled"
 export MAC_OS_WORK_PATH=/tmp/downloads
 export MAC_OS_CONFIG_PATH="../mac_os-config"

lib/utilities.sh

@@ -19,7 +19,7 @@ export -f clean_work_path
 
 # Caffeinate machine.
 caffeinate_machine() {
-  local pid=$(ps aux | grep caffeinate | grep -v grep | awk '{print $2}')
+  local pid=$(pgrep -x caffeinate)
 
   if [[ -n "$pid" ]]; then
     printf "Whoa, tweaker, machine is already caffeinated!\n"