What is a WPA2 Password?

To connect to any Wi-Fi network, you need the SSID (network name) and the network password.

WPA2 (of some sort) is the Wi-Fi network security being used with this Wi-Fi, and the password is the network password you’ve set for the Wi-Fi network.

You’ll either have to remember what was set for the Wi-Fi network, or maybe find the Wi-Fi password from an existing and connected devices that’s willing to show you the password. Keychain Access on Mac can show the Wi-Fi password, if it’s been remembered there.

Once you know the SSID and the password, you can try forgetting the network on the Mac, and re-adding it. That might allow you to store the network password in Keychain for future access to the network, and avoid having to re-enter the password at each reconnection.

If you have iCloud Keychain enabled on all of your devices, then the SSID and password will be available across all decices associated with the Apple ID in use.

You’re here specifically using WPA2 AES security too, if you’re on recent iOS, iPadOS, and macOS versions and not getting reports about weak Wi-Fi security. There’s a WPA2 TKIP which sill report as insecure.

Apple’s ➡️ Recommended settings for Wi-Fi routers and access points - Apple Support

If your LAN requires a password, every device logging in must supply it unless someone altered the setup to require no password.

Most likely scenario is your iPAD and iPhone were logged in with the password, but they were set to remember it. All of our devices are set up that way: 2 iPads, 2 iPhones, 3 iMacs, 2 MBPs and a watch. All required an initial PW but non subsequently because the PW is remember on each.