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That is an excellent suggestion and I have up voted your comment. It would be jolly decent of you to pop that in an answer to my question however. apple.stackexchange.com/questions/263636/…
Take note, the warnings are very real. I followed the instructions to the letter (although the terminal command needed to be run with sudo) on a MBP mid-2009. I got the reboot and the progress bar but then it rebooted and now is a brick.
Right-click Desktop and select "Snap to Grid". The option in the context menu will now have a check next to it but at least will release your desktop. This was hellish!