Notebooks
Q: exclamation mark on airport icon... internet sharing not working!
hi everybody! first of all sorry for bad english, i'm italian...
i own a macbook pro 15' late 2008 with leopard (10.5.8); my sister owns a macbook pro 13' late 2009 with snow leopard (10.6.2).
we used to connect one of our mac to the internet with a internet key and connect the other one to the first using internet sharing via airport.
it is about a week that internet sharing gives problems (neither I nor my sister have not changed the settings): the mac with the internet key works just fine, you can use internet and activate internet sharing; when you try to connect the other mac to the first by airport, it keeps the connection for about 5-10 seconds, then an exclamative mark appears on the airport icon and if you click on it there is a warning saying "no internet connection" as you can see below:
http://img203.imageshack.us/img203/5044/immagine5k.jpg
("macbook pro" is the network i created with my mac; i took the screenshot on my sister's mac after trying to connect it)
when this happened for the first time, i looked in System preferences > Network; clicking on "Airport" i could see "Airport has an autoassigned ip and may not be able to connect to the internet" (this appeared on both mac when they where connected)
when i saw it i went on "Advanced" and i set manually the ips (192.168.1.1 for my mac, 192.168.1.2 for my sister's)
after this the writing changed to "Airport is connected to macbook pro with the IP address 192.168.1.X" (the X was 1 for my mac, 2 for my sisters)
i tried almost everything, i deleted some .plist files in library/preferences/systemconfiguration as written in some thread on apple forum; i deleted the airport system preferences and re-introduced them correctly, i tried the same on my sister's mac but it still don't work.
the key can't be the problem because it always worked and it still work for the mac directly connected. i read in internet that the "exclamation mark problem" is quite common for snow leopard user and many of the thread on apple forum were recent (january-february-march 2010).
may the problem depend on some updates? i tried to update my and my sister's mac after the problem came up but it still don't work.
please, help me...!!
i own a macbook pro 15' late 2008 with leopard (10.5.8); my sister owns a macbook pro 13' late 2009 with snow leopard (10.6.2).
we used to connect one of our mac to the internet with a internet key and connect the other one to the first using internet sharing via airport.
it is about a week that internet sharing gives problems (neither I nor my sister have not changed the settings): the mac with the internet key works just fine, you can use internet and activate internet sharing; when you try to connect the other mac to the first by airport, it keeps the connection for about 5-10 seconds, then an exclamative mark appears on the airport icon and if you click on it there is a warning saying "no internet connection" as you can see below:
http://img203.imageshack.us/img203/5044/immagine5k.jpg
("macbook pro" is the network i created with my mac; i took the screenshot on my sister's mac after trying to connect it)
when this happened for the first time, i looked in System preferences > Network; clicking on "Airport" i could see "Airport has an autoassigned ip and may not be able to connect to the internet" (this appeared on both mac when they where connected)
when i saw it i went on "Advanced" and i set manually the ips (192.168.1.1 for my mac, 192.168.1.2 for my sister's)
after this the writing changed to "Airport is connected to macbook pro with the IP address 192.168.1.X" (the X was 1 for my mac, 2 for my sisters)
i tried almost everything, i deleted some .plist files in library/preferences/systemconfiguration as written in some thread on apple forum; i deleted the airport system preferences and re-introduced them correctly, i tried the same on my sister's mac but it still don't work.
the key can't be the problem because it always worked and it still work for the mac directly connected. i read in internet that the "exclamation mark problem" is quite common for snow leopard user and many of the thread on apple forum were recent (january-february-march 2010).
may the problem depend on some updates? i tried to update my and my sister's mac after the problem came up but it still don't work.
please, help me...!!
MacBook Pro 15' late 2008, Mac OS X (10.5.8)
Posted on Mar 8, 2010 3:28 PM
by dinsky,Solvedanswer
my colleague is having the same problem. there are 3 Macs in my office, 2 macbooks and 1 macbook pro. sharing internet connection between the macbook have always been okay, but never worked with the macbook pro. we tried to restart the one that shares the internet, and the macbook pro, but still didnt work.
until we tried these step (we dont really know what we were doing, so for those who understand, maybe the solution we offered is not so efficient, but hey... it works for us, hope will do the same for you)
open keychain access and delete all password information of the wifi network that you want to connect to.
make sure you are not connected to the wi-fi that you want to connect, then open system preferences>network>airport>advanced, on the preferred network delete the wifi that you want to connect.
then still on the preferences>network>airport>advanced open the TCP/IP, change from manual to DHCP, and to make sure it'll work check the DNS in other computer within the network you want to connect to, and duplicate it but make sure to put different number on the last digit.
okay, that's all... hope it can help
until we tried these step (we dont really know what we were doing, so for those who understand, maybe the solution we offered is not so efficient, but hey... it works for us, hope will do the same for you)
open keychain access and delete all password information of the wifi network that you want to connect to.
make sure you are not connected to the wi-fi that you want to connect, then open system preferences>network>airport>advanced, on the preferred network delete the wifi that you want to connect.
then still on the preferences>network>airport>advanced open the TCP/IP, change from manual to DHCP, and to make sure it'll work check the DNS in other computer within the network you want to connect to, and duplicate it but make sure to put different number on the last digit.
okay, that's all... hope it can help
Posted on Mar 12, 2010 12:30 AM