I have a new network. But the machines (iMac, capsule, MacBook pro) often f-go back to an old network which isn't connected! How do I delete permanently an old network on the list?
MacBook Pro 15″, macOS 10.15
Please refer to https://support.apple.com/en-us/HT208941
.Yes done all that, thanks.
I think I might have solved the problem which is related to my time capsule/airport utility. I changed broadband supplier a while ago and forgot to edit the wifi address on the capsule. It was that which was causing the conflict and I think it’s now disappeared..
have you tried SystemPreferences>Network? you highlight the network you want to remove, then click on the "-" button to remove it from the list.
wifi networks
