By default, MacBook / Mac it automatically connects to the wireless networks for which we have saved passwords and to which we have connected in the past. These are saved in the account iCloud, so if we have connected in the past with iPhone to a Wi-Fi network, and Mac it will automatically connect to this network without the need to enter the password. In the worst case we will be asked to give share your wireless password from the other device already connected.
If we are in the coverage area of several Wi-Fi networks for which we have saved passwords or we have a router with 2.1 Ghz and 5 GHz, MacBook it will not connect to the network with the strongest signal and the best internet quality but to the first network the list of available connections. If we want to change the network to which MacBook to connect automatically, we will have to go to this list and change the order from the list of saved Wi-Fi networks.
How to change the order of automatic connection of Wi-Fi networks saved on macOS
1. Go to “System Preferences”→“Network"
2. In "Network"Select"Wi-Fi"From the list on the left, then click on the button"Advanced”From the bottom.
Next to "Network Name" appears the name of the wireless network to which we are already connected. In our case: UPC-CNT 5GHz.
If we want that MacBook not to automatically connect to UPC-CNT 5GHz but to Apple Network% GHz, all we have to do is to select the network that we want to automatically connect to and bring it to the top of the list. Drag it with the mouse / cursor.
When the operating system is restarted MacBook will connect to the first Wi-Fi network in this list.
Here again we can delete or add new wireless networks.How to change the order of automatic connection of Wi-Fi networks saved on macOS