Can't connect to attached-to-mac internet

Hello,
I'm having trouble connecting to an internet provider that has its internet connection attached to a specific mac address. For this i need to change the mac address of my ethernet card, but it doesn't work. I use snow leopard and what i did was sudo ifconfig cardid ether macaddr. Verifying with ifconfig cardid showed the new mac, but suddenly i wasn't able to connect anywhere. I think a laptop is supposed to be a portable computer that you can connect to a cable anywhere, but now i can't do even that. Does anyone know any workarounds or at least information on why is apple slowly killing us with decisions like this? Using airport is not an option since most of the networks i connect to are wired.

You're right, authorization is managed by an ISP. That's why you can't connect a macbook to another ISP than yours (because you can call your ISP and explain that you have a ****** computer and ask them to change the mac address on their side). One would change the MAC address of a windows or linux machine to connect to another ISPs, but apple does not allow that. It has something to do with apple tying their os to hardware or maybe it's yet another "feature" into their collection. That's why i'm searching for people with this issue and i want to know how they're dealing with it.

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HT4628 some times my internet connection will say it has timed out and I can not connect. but my friends mac never has a problem. How can I fix this?

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sunnovagun!
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Hello.
I got a problem with my new MacBook. Every time im connecting it to the internet, the status of the internet connection turns yellow. This happens both with Wireless and Ethernet connections. Sometimes its working for like 10 minutes, and then it doesnt. After it's off the internet once again. All the other computers can't connect. Its like it can't get its own IP-adress. It steals the Windows Ip-adresses and then they cant connect to the internet.
Anyone able to assist me? Or should i call Apple?
Sorry for my bad english, im not pro at it yet.
Regards,
Martin from Denmark.

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Does your router have a setting where you can limit how many computers can be connected at one time?
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Wow, you are the best.
Yip this is what the website looks like. Great job Linc Davis.
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Can't connect to attached-to-mac internet

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