I think it will ask, but it’s optional. You can do it later if you’d prefer. The only time it’s mandatory is if you are restoring from a back up or transferrin

I think it will ask, but it’s optional. You can do it later if you’d prefer. The only time it’s mandatory is if you are restoring from a back up or transferring from another computer with a newer operating system. So if your old machine was on 10.20.1 but your new machine is 10.19.4 because that was the newest when it was put in box then you’ll have to update it first.