ERROR 1045 (28000): Access denied for user ''@'localhost' (using password: NO) on mac

gistfile1.txt

I used above solution for me. It works. I hope it works for you too.

same with (using password: YES)

brew remove mysql 
brew cleanup 
sudo rm /usr/local/mysql 
sudo rm -rf /usr/local/var/mysql 
sudo rm -rf /usr/local/mysql* 
sudo rm -rf /Library/StartupItems/MySQLCOM 
rm -rf /opt/homebrew/var/mysql

After uninstall all mysql data in mac, then I installed from https://dev.mysql.com/downloads/mysql/.

After installation steps I configure a password for mysql server. Than I run terminal: 

mysql -u root -p

I entered password and it worked.