I've found a guide described at the following site very straight forward if anyone still needs help. How To Sync Contacts From Your Macintosh To Your New Blackberry 8120 (pearl) - BlackBerry Forums at CrackBerry.com
here is the url incase the link doesnt work ( just remove the "<" and the ">" )
just UNINSTALL the whole program REBOOT the mac and START installing [b]each application at a time[b/] in order to evade any complications.
that is start with a fresh download
of PocketMac from the BB site, REBOOT
then install the update also provided by the BB site, REBOOT
and after that install the update driver provided by the PocketMac site and REBOOT. YOUR DONE at this point.
Connect the 8120 before opening the PocketMac