How to fix fontd process taking up 100% of the CPU?
I experience reoccurring incidents of fontd eating up all the process power. What could be the cause of this and how do I make it behave again?
sudo atsutil databases -remove; atsutil server -shutdown
From 50% cpu usage to 1%
Source: http://icicity.com/2014/02/13/high-cpu-usage-caused-by-fontd-on-os-x