You verified which wifi network you are connecting to? Just want to make sure you aren't accidentally picking up a neighbor's network. Does it have a unique name? There are a lot of wifi networks out there called Linksys or the like.

CB

On 9/29/14, 10:21 AM, Christine Grassman wrote:
Yes, tried all of these things, as per Apple Communities.
        
On Sep 29, 2014, at 10:18 AM, 'Chris Blouch' via MacVisionaries 
<macvisionaries@googlegroups.com> wrote:

What have you tried so far? I assume you tried turning the wifi off and back on 
again? Did you try and renew DHCP Lease (unter the TCP/IP tab in the advanced 
settings)? Can you get the IP address, subnet mask, router and DNS address from 
one of your working devices, turn that device off and then manually config that 
on your Mac's wifi to see if that works?

CB

On 9/29/14, 9:27 AM, Christine Grassman wrote:
Hi.  I've already tried the manual route; as stated, all other choices beside DHCP are 
dimmed, and I don't know why. As for the router, the documentation is not accessible, so 
I have no clue how to go about updating the firmware. All other devices in the house are 
connecting just fine, and the WiFi is showing on my status menu as present and on,  but 
there is a "self-assigned IP address" and it says it cannot connect to the 
Internet. I cannot figure out how to change this IP address. I cannot erase it. I am at a 
complete loss.
Christine

On Sep 29, 2014, at 7:52 AM, Sabahattin Gucukoglu <listse...@me.com> wrote:

It sounds like there is some bad interaction between your Mac's DHCP client and 
your router's DHCP server since your upgrade.  If your ISP already knows about 
it, presumably they already know about it.

Do you have control over the router?  If it has firmware, you should try to 
locate the latest version, and upgrade it.  If the router is crippled by design 
because your ISP has control over it, my recommendation would be to buy your 
own router.

You could try setting your IP address manually.  In System Preferences, 
Network, you select your interface, then choose to configure IP manually; if 
it's not on the main screen, press Advanced and it's there on the TCP/IP tab.  
You've got to use an IP address and subnet mask compatible with your other 
devices; pick an IP not likely to be used, like near the end of your range.  
You could use Google DNS (8.8.8.8, 8.8.4.4) until you learn the addresses of 
other servers of your ISP, if desired.

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