Hi, I have installed 10.14.6 update yesterday. I noted some interesting things. During update MacBook powered down, then I powered it again and shows up white Apple logo on black background again but progress bar back away instead of progress forward. After a while MacBook powered down, then I needed to power it again by itself and then update take up to 20 mins and finished with success. I do not understand this situation, is it normal? Regards.