BTDT, have experienced numerous freezes on my 2013 iMac since my upgrade. At first I suspected the NVidia video drivers as it locked up in a few games I never l

BTDT, have experienced numerous freezes on my 2013 iMac since my upgrade. At first I suspected the NVidia video drivers as it locked up in a few games I never locked up before in, yet reverting to the Apple drivers had no better result. Interesting is that whatever is in my browers; usually watching streamers or listening to radio; still is active. I just have lost all input. Pulling the USB connections have no effect. Then there are the times it just freezes hard. the annoying part is that since I have bootcamp in all instances after a hard freeze the system wants to boot to that volume instead and even more fun, keyboard use of the option key fails until I let it successfully boot into Windows. As in, the option key fails with either USB or BT keyboard until a successful boot occurs