Mac Software Update Very Slow. It is an exciting update that may seem somewhat drastic compared to other macOS updates you have done over the years. The activity monitor showed that the process softwareipdated was receiving data at anywhere from 1 to 25 kbs.
However the above manual solutios would cost you a great amount of time. My Mac does seem to operate without any issues in all other regards. Another reason why macOS Big Sur running slow is that those resource-hungry applications are taking away too many system resources while running.
Ensure macOS Software Update is not Downloading in Background.
So to update your macOS and speed up your Mac go to the Apple menu and click About This Mac. The slow Mac after High Sierra update is a widespread problem facing many users using different Mac models. But for performance and user experience Big Sur is sure to be a welcomed favorite. However the process of speeding up that slow Mac can be a lot easier with Parallels Toolbox for Mac and Parallels Toolbox for Windows.