Problème installation pygame mac

Bonjour, j'essaye d'installer pygame avec pip sur un mac (j'ai un pc avec lequel ça marche très bien mais je ne suis pas chez moi et j'ai un pc fixe donc je dois me rabattre sur un mac -_-)
j'essaye d'installer pygame avec diverses techniques mais ça me mets toujours le même message "The directory '/Users/mac/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/mac/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting pygame
Could not fetch URL https://pypi.python.org/simple/pygame/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) - skipping
Could not find a version that satisfies the requirement pygame (from versions: )
No matching distribution found for pygame" pouvez vous me dire ou est le problème ? Merci d'avance, bonne journée !