For computers that do not reflect an increase in Macintosh HD size after running ALL steps in the install guide.
After you have completed the entire install guide, including the "Optional Step 8" (which must be run twice), you should run the "Fix Pear" option from the "TarDisk Selector Tool". To do so, from the "Pear" menu, select "Fix Pear". Performing this command will make your computer go un-responsive for upto an hour. Restart your computer after this process for changes to take effect. The above video walks you through this process