iMac startup sound using the latest version OSX

  steve-2343933 16:30 04 Dec 2015

When switching on my iMac all I get is a sound like a double click like a camera shutter and nothing else, apart from that it starts and works fine. Any one got any ideas?

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Xiaomi Mi A3 Release Date, Price & Specification Rumours

HP Z27 Monitor Review

Best Apple Deals of Amazon Prime Day 2019

Les bons plans tablettes (2019)