Error in Library tidyverse, could not find Library

Hi, I have downloaded tidyverse, and it is installed, but when I add the command, I get this error message.

can anyone help?, is the library in the wrong place and if so where would I then move it to, as I don't appear to have the option to move it onto my Mac.

Everything in R is case sensitive


Thanks so much, just hadn't realised it was that simple, that was a real help!