Use a MAC as router for Raspberry Pi

Hi all, I' ve a raspberry pi, but at home I haven' t an internet connection and I use a free wifi. To connect Raspberry so I thinked to use my MAC as router, I went in Preferences->Internet and wireless->Share and I checked Share Internet: Share from: Wifi at computer that use: Ethernet.
But Raspberry still doesn' t connect. What should I do?
When I write in Raspberry terminal (LXTerminal)

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ifconfig

there are two result

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eth0

with some infos and

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lo

with some infos, but if I write

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iwconfig

the result of each one is

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Interface doesn' t support scanning.

I' m using Mac os 1.8.2 and Raspberry Pi with Raspbian.

Help me, Thank you!!!
AlessioMTX

Well, iwconfig is for configuring WLAN, so without a WLAN device, no Wlan configuration.

1. Turn off your firewall in Lion to prevent any interuption.
2. Turn on Internet Sharing in Lion (Share Wlan to Ethernet)
3. Type "ifconfig" in terminal in Lion and see what IP your bridge0 has (should be 192.168.2.1)
4. type "dhclient eth0" in terminal on your Raspberry. If you don't get an IP from Lion try the following.
type "ifconfig eth0 192.168.2.2" and then "route add default gw 192.168.2.1 dev eth0"
5. Now ping a server e.g. "ping 8.8.8.8" (google nameserver) and check if it replies. If everything went well then check if /etc/resolf.conf has a line like "nameserver 8.8.8.8" (or whatever dns-server you prefer) Everything without the quotes " off course.

good luck!
star

Thank you, I' m going to test it this afternoon!!!

OK now I need to connect my Raspberry Pi to internet with mac, I had the opportunity to use a modem, so I didn't try.
I'm trying now, if I type

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ping -c 5 8.8.8.8

the Raspberry seems connected, but if I try to browse or also try to type

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ping -c 5 www.google.com

as result I have

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ping: unknown host www.google.com

Help me What should I do?

http://www.mactip.net/share-internet-connection-mac

I know that.. I have problem to connect

I know that.. I have problem to connect

Dude, if it replies with "ping 8.8.8.8" but not with "ping google.com" then your /etc/resolve.conf isn't set correctly. It should have a line like e.g. "nameserver 8.8.8.8" (like i allready wrote previously)

Excuse me but you wrote resolf.conf ,so is

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resolve.conf

??

Thank you I'm going to try

The right file is

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resolv.conf

I've solved

Haha! Ok, my bad! So you resolved it...

Yes, thank you