Missing icons on macOS Sierra I'm on macOS Sierra and I have been losing icons randomly, as you can see below, the Adobe Illustrator folder does not look like it should.



This also occurs in the Dock:



FaceTime (left of iTunes) has no icon, this also occurs with numerous other applications such as Inkscape, Gimp, and a few others.

Please help!
I had to run the below commands to make my icons come back. It took a while to find, but it finally sorted everything. 

sudo find /private/var/folders/ -name com.apple.iconservices -exec rm -rf {} \;
sudo rm -rf /Library/Caches/com.apple.iconservices.store
killall Dock