Can you give me your specific operating system on MacBook?
I would like to check to see if you have one of the last 3 version of MacOS installed. You might have to upgrade the Mac to support Rstudio and R. To help you out, I am going to @ the last person who dealt with Mac problems. See for example this error.
Also your other error has to do with utf-8 settings under global options.
P.S. That restart is probably because he reinstalling dplyr and tidyverse twice.