After the latest software update, my laptop cannot connect to the local wifi. I have tried restarting the laptop, restarting the wifi, running the diagnostics and following the self-help on the apple website, but I still cannot get it to connect. the icon shows the internet signal covered by an exclamation sign.
MacBook, macOS 13.2
Do you have other devices that connect to that router? No issues there? When your MAC (or any internet capable device) connects either wired or wireless to a network, if it is set 'DHCP', it will broadcast a request for an IP from any DHCP server on the same network (in larger networks, the broadcast is relayed to the network with the server) until it finds a DHCP server that responds with an IP, that the computer then assigns to itself.
In your case, at least one of 3 things isn't happening. Either your computer isn't broadcasting that it needs an IP from the DHCP in your router, the wireless isn't transmitting that broadcast to the router, or the router isn't able to 'read' the request or respond with an IP address. We can pretty much eliminate the wireless/router if other devices are still going just fine.
Did you try to open WI-FI settings, then click DETAILS, and then TCP/IP along the left side and click 'Renew DHCP lease'? If nothing happens, try clicking 'Forget This Network', also on the WI-FI Details. You will have to then select your wireless from the list your MAC sees, and supply the SSID 'password' again to reconnect to it.
There is one real long shot.. the router DHCP settings are set to provide IPs from a range, and while the typical home router is configured with a network of several hundred IP addresses, they typically have a range in DHCP that is much smaller. If you have a 'modern' home with all kinds of security cameras, WIFI lighting, computers, tablets, cell phones (even appliances these days for shoots sake), all the IPs that the router is set to give out may all be in use. I said it was a long shot, but it can't hurt to log into the router and take a look there.
Do you have other devices that connect to that router? No issues there? When your MAC (or any internet capable device) connects either wired or wireless to a network, if it is set 'DHCP', it will broadcast a request for an IP from any DHCP server on the same network (in larger networks, the broadcast is relayed to the network with the server) until it finds a DHCP server that responds with an IP, that the computer then assigns to itself.
In your case, at least one of 3 things isn't happening. Either your computer isn't broadcasting that it needs an IP from the DHCP in your router, the wireless isn't transmitting that broadcast to the router, or the router isn't able to 'read' the request or respond with an IP address. We can pretty much eliminate the wireless/router if other devices are still going just fine.
Did you try to open WI-FI settings, then click DETAILS, and then TCP/IP along the left side and click 'Renew DHCP lease'? If nothing happens, try clicking 'Forget This Network', also on the WI-FI Details. You will have to then select your wireless from the list your MAC sees, and supply the SSID 'password' again to reconnect to it.
There is one real long shot.. the router DHCP settings are set to provide IPs from a range, and while the typical home router is configured with a network of several hundred IP addresses, they typically have a range in DHCP that is much smaller. If you have a 'modern' home with all kinds of security cameras, WIFI lighting, computers, tablets, cell phones (even appliances these days for shoots sake), all the IPs that the router is set to give out may all be in use. I said it was a long shot, but it can't hurt to log into the router and take a look there.
Wi-Fi Problems
Shutdown or unplug Router for 30 seconds. Then turn it back on.
Wait while it initializes and all the flashing Lights on the Router stop flashing. Some may still flicker quickly and that is normal.
Then attempt to connect to the Wifi from the Router
Check your Wi-Fi settings on your computer and insure Wi-Fi is enabled:
System Settings, Wi-Fi. Click Details and choose 'Automatically join this network'.
Recommended settings for Wi-Fi routers and access points - Apple Support
Thanks! I tried this, but it did not work. The Wireless Diagnostics tells me my "Mac has a self-assigned IP address because it cannot locate a DHCP server." It refers me to my Service provider for further assistance. I contacted Apple support. They also sent me to my Service Provider, which sent me back to the laptop manufacturer... all this just because of the latest update to the operating system (!)
Laptop does not connect to my wifi
