I have googled and searched the forum about this issue but still do not really understand the function of the location setting on my MacBook air wifi. I usually use the automatic setting for connecting to wifi using DHCP. This works fine for 90% of what I do. However, one office I go to my machine will not connect with DHCP with automatic ip. I have to manually assign an ip address them I am good to go. I thought I could set up a different location as roaming with that office's wifi setting and just switch locations and it would work. But this does not seem to work. If I set up the roaming location with DHCP with manual ip it will work, but when I go back to automatic the DHCP with automatic IP, the settings do not seem to switch back. It seem to stick with DHCP with manual IP. I am missing the point of the Locations option in wifi? Is there a better way to do this? Thanks for any help. I appreciate it.