I have no problems sending pics to my macbook pro. I have a 9000, but I would think the process similar. I just click on the pic and hit send using bluetooth and then I get a pop-up on my mac for confirmation. If the mac and the phone are paired, this should be easy.
One thing you can check is to open the bluetooth option on your mac, click on your phone (should say Blackberry 8900 in your case) in click file sharing setup and make sure "bluetooth sharing" is checked. My pics go to the downloads folder, but I think you can change that if desired.
I hope this helps you out.