macos socket so_reuseport does not work

client.py

import socket
import select


def test():
    c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    c.connect(("", 8877))

    c.send(b"hello world")
    print(c.recv(1024))

    c.close()


if __name__ == "__main__":
    import threading

    threads = []
    for _ in range(1000):
        t = threading.Thread(target=test, args=())
        t.start()
        threads.append(t)

    select.select([], [], [])

server.py

import socket
import os
import select


def create_server(addr):

    server = socket.create_server(addr, backlog=10, reuse_port=True)
    server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

    while 1:

        client, addr = server.accept()
        while 1:
            data = client.recv(1024)
            print(f"{addr} {data} {os.getpid()}")
            client.send(data)
            break
        client.close()
    exit()


if __name__ == "__main__":

    for _ in range(4):
        pid = os.fork()
        if pid:
            continue
        else:
            create_server(("", 8877))
    select.select([], [], [])