I got my MAC for over 2 years right now and I was sick and tired of copy and then delete a file in finder. I didn’t see the move option anywhere.
Finally I found the solution.
It’s not a logical one, but it’s working.
Go to finder and use copy (from menu of <command> c) when you highlight the file.
Then go to the directory you want to move the file to and use <command><option> v. Now the file is move to that directory. Hooray !