It's a permission issue. Change the ownership with `chmod -R 777 /usr/local/var/mysql/` and try again
It gives me this:
chmod: Unable to change file mode on /usr/local/var/mysql/: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//########.local.err: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//#######.pid: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//auto.cnf: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ca-key.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ca.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//client-cert.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//client-key.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ib_buffer_pool: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ib_logfile0: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ib_logfile1: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ibdata1: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//ibtmp1: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//mysql: Operation not permitted
chmod: /usr/local/var/mysql//mysql: Permission denied
chmod: Unable to change file mode on /usr/local/var/mysql//mysql: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//performance_schema: Operation not permitted
chmod: /usr/local/var/mysql//performance_schema: Permission denied
chmod: Unable to change file mode on /usr/local/var/mysql//performance_schema: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//private_key.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//public_key.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//server-cert.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//server-key.pem: Operation not permitted
chmod: Unable to change file mode on /usr/local/var/mysql//sys: Operation not permitted
chmod: /usr/local/var/mysql//sys: Permission denied
chmod: Unable to change file mode on /usr/local/var/mysql//sys: Operation not permitted