iMac not shutting down since upgrading to OS X 10.11, El Capitan The iMac will not shutdown as normal, the spinning loader is visible and it stays in that state if I don't interrupt it using the power button.

I want to be able to shutdown as normal, at present I'm having to use the power button on the back to interrupt.

I've noticed a few posts on here with the same problem, unfortunately i dont have enough 'reputation points' to comment on their thread. My workflow has stalled to a halt since upgrading to OS X 10.11, El Capitan. Adobe InDesign is terrible and I am really disheartened with Apple for the first time since 1988.

I checked the filesystem with Disk Utility.
I have found that clearing all cache and font maintenance resolved the issue.   

rm -rf ~/Library/Caches/*
rm -rf ~/Library/Saved\ Application\ State/*
sudo rm -rf /Library/Caches/*
sudo rm -rf /System/Library/Caches/*
atsutil databases -removeUser
sudo atsutil databases -remove
sudo atsutil server -shutdown
sudo atsutil server -ping
sudo rm -rf /var/folders/*


Restart immediatly