During the weekend, I tried connecting my Nokia E90 to my Macbook, running OS X 10.5.4 Leopard, with the hope of getting Internet access through the phone.
Surprisingly, it turned out to be simple. Very simple in fact. Here are ten detailed step-by-steps.
1. Download and install Nokia iSync support for your phone.
2. Connect Mac to Nokia phone via Bluetooth. Click on Bluetooth icon, then select Setup Bluetooth Device.
3. Bluetooth Setup Assistant should appear. Click Continue.
4. Select Mobile Phone, click Continue. Turn on Bluetooth on your phone, make it Discoverable.
5. Mac should be able to find your phone. If no, make sure that Bluetooth on your phone has been turned on and it’s Discoverable.
6. Select your phone and click Continue. Wait for your Mac to gather information about your phone.
7. With Nokia E90, the following options appear. Tick both, then click Continue.
8. Bluetooth Setup Assistant will ask you more details on your connection. For me, since I uses Starhub, I only need to put in APN value shwap, left username and password empty, and clicked Continue. This is potentially the most difficult step of all as it need you to find out what is the APN name for your mobile phone data connection.
9. When everything goes well, you’ll be congratulated 
Click Quit.
10. Go to System Preferences -> Network. Select Bluetooth and click on Connect. Voila, that’s it !! Your Macbook should now be able to connect to Internet using your mobile phone data plan. To be sure, I turned off my Airport, launched Firefox, and browsed to Google. It works !! 
If you go to Connection Manager in your phone, you should see an active connection established.
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Thank you so much. This got my nokia 5800 working as bluetooth modem on my macbook os x 10.5.6
PS Greetings in the Lord. I assumed Christian was your name, not your calling. Praise God for his gospel and his geeks.
Please visit our church website http://www.stpeters-dundee.org.uk
Hi Big D, great to know my article can be of any help
Christian is my surname, my belief, my calling, yeah, everything about me
hey all cell phone can be a modem how to connect to the pc using cable of cell phone instead of a bluetooth
I’m wondering if I can use these instructions to tether my Nokia N95 8gb with my MacBook Pro running Snow Leopard on t-mobile
Before, I had first gotten my MacBook Pro synced to my Nokia using this site:http://thenokiablog.com/2007/08/21/how-to-tether-your-nokia-to-a-mac-to-access-the-net-via-bluetooth/
Hi,
Thanks to your instructions, I could pair my Nokia 5800 with my Macbook Air. Now when I try connecting, I am unable to do so and the message I am getting reads “Failed to open an RFCOMM serial channel. Check if authentication needs to be enabled in your device.” Pl advise.
Hi Pankaj, have you set your Macbook Air to “Authorized” in the bluetooth menu of your Nokia phone?
Hendrick,
What a godsend…unbelievable, after hours od searching useless links peddling software instead of fixes, I come across yours and ….voila!
Did it once, and worked like a dream!!
Good on ya mate!
thanks heaps..
Greg
Glad to help Greg
Hey Christian,
Thanks for this great guide!
Do you know if the E90 is also tetherable through WIFI (for faster connection, I’d imagine..)
cheers and thanks again,
Victor
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Hey, youre the goto expert. Thanks for haningg out here.
great buddy, it works on Lion without iSync. You are awesome.