If you're new to AirPods, considering buying a pair, or just want to pick up some new tips.
Apple Issues New 27-Inch iMac Firmware Update to Address Display Issues
Updates the display firmware on 27-inch iMac systems to address issues that may cause intermittent display flickering.
The 27-inch iMac Display Update will update the display firmware on your iMac. Do not disturb or shut off the power on your iMac during this update.