Tethering Blackberries on Mac via Bluetooth: AT&T

In the same vein as tethering to a Windows XP system, here are brief instructions for doing it on a Mac OS X 10.5 system!
(Thanks to amkls704 at howardforums.com and Eugene Dong for instructions)

Extract this file (blackberry-3g-cid1.zip) to:

/Macintosh HD/Library/Modem Scripts

(Secondary Download Source, requires registration

You have your Blackberry and Mac paired, we actually need to remove that pairing and begin from scratch. Remove the phone from your paired devices list on your Mac, and on your Blackberry, remove your laptop as a paired device.

Re-pair your Blackberry and laptop. (Run the “Setup Bluetooth Device” wizard)

Choose:

- Mobile Phone
- Blackberry 9000
- Hit Continue Again
- Check the box next to “Access the internet with your phone’s data connection”
- For the Phone Vendor: Choose Other and for the Phone Model: Choose Blackberry 3G CID1 (the script you put into the modem scripts folder)
- Launch Network Preferences, and click "Bluetooth" in the list.
- Select "Add Configuration" from the Configuration drop list. Name the configuration AT&T via Blackberry Bold (or something like that)

o Username: WAP@CINGULARGPRS.COM
o Password: CINGULAR1
o Telephone Number: wap.cingular

- Check "Show modem status in menu bar"

That should do it! Click on “Connect Bluetooth” on the modem icon on the Mac, a connection timer should come up and let your mac in on the 3G goodness!