我无法在mac上安装python mediapipe库

python3 -m venv myenv
source myenv/bin/activate

pip install mediapipe

pip install mediapipe==0.8.9.1

xcode-select --install

brew install cmake protobuf

import cv2
import mediapipe as mp

mp_hands = mp.solutions.hands
hands = mp_hands.Hands(max_num_hands=2, min_detection_confidence=0.7)
mp_drawing = mp.solutions.drawing_utils

cap = cv2.VideoCapture(0)

while cap.isOpened():
    success, image = cap.read()
    if not success:
        break

    image = cv2.cvtColor(cv2.flip(image, 1), cv2.COLOR_BGR2RGB)
    image.flags.writeable = False
    results = hands.process(image)

    image.flags.writeable = True
    image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)
    if results.multi_hand_landmarks:
        for hand_landmarks in results.multi_hand_landmarks:
            mp_drawing.draw_landmarks(image, hand_landmarks, mp_hands.HAND_CONNECTIONS)

    cv2.imshow('MediaPipe Hands', image)
    if cv2.waitKey(5) & 0xFF == 27:
        break

hands.close()
cap.release()
cv2.destroyAllWindows()