Currently Being ModeratedApr 2, 2013 1:27 PM (in response to tianoy)
Wow. Same problem. Like often happens when a Mac quirk shows up I just wasted hours of my life and finally got it to work. I'll share the steps I took. First it worked two days ago at the same coffee shop, the only thing that had changed was the password, however no matter how many times I entered the password in the different forms. Nothing. All I got was a not connected... due to the "self assigned IP address" message. I attempted the tricks that people posted here: 1) Turned off and back on the wi fi ... nothing 2) restarted the computer... nothing 3)I went into System Preferences > under TCP/IP I changed the Configure IPv4 to "Using DHCP Manually" and used an IP address close to the one from my other mac which was connected just fine... almost nothing... the green light went on and it said connected under wi fi in the left panel of the preferences... but no actual connection 4) I changed the Manual IP address to Match my working Connected Mac... almost nothing... the green light again went on and it said connected under "wi fi" in the left panel of the preferences... but no actual connection 5) I deleted "Wi Fi" from the left panel and recreated it using the + and - buttons on the bottom of the left pane and hit renew DHCP address, but it recreated the same 162... IP as before and still not working 6) I changed the from a 162... to a 192... nothing 2) I hit Renew DHCP Lease... nothing same IP.
Here's what finally worked: Again in System Preferences>Network> I turned Wi-Fi off, Went to Advanced>TCP/IP>Configure IPv4 and changed it to off, hit "OK", Highlighted Wi-Fi in the left column, hit the - sign on the bottom left, deleting it, then hit the + and created it. I got a message saying there is no assigned IP address so I went back into >advanced>TCP/IP and turned on Using DHCP, Hit "Renew DHCP Lease" and it finally created a brand new IP address 10..... and if finally F'n worked.
Jeez Apple get it together. This is a ridiculous problem.
I hope my struggles actually help someone
tried this but i usually get disconnected 10 mins later