Fan in iMac making avery slight ticking sound when running at low speed
My iMac 5K has a slight ticking noise when running at low speed. I only noticed it when i woke up to check a download in the early hours of the morning. Am I just being paranoid? or should I worry. Has anyone else had this?
iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10.4)