how to fix weak security wifi on mac

The weak security warning doesn't prevent connecting to the internet.

To eliminate the weak security warning, change the security settings on your router to WPA3 Personal, WPA2/WPA3 Transitional or to WPA2 Personal AES. How you do that varies by router. If you don't have the instructions for your router, do an internet search for instructions for your router brand/model or if your router is supplied by your internet service provider, check their website or customer support. Also see: Recommended settings for Wi-Fi routers and access points - Apple Support