After installing the upgrade to 10.15.6, Siri is not working on my iMac 2020, tried everything I can do still no help to recover it. The setting flashes and quits when I set Hey Siri. Siri just shows a blank panel when I hit the Siri on the top right. by the way, is it relevant that my Mac plays the startup chime instead of Apple saying the T2 Mac won't play the startup chime?