For now, the Mac Desktop Software has to download the update itself. You cannot use anybody's software for your model like with the Windows BB client. The Mac version will update when it sees an official update from your specific carrier for your specific device. Until then, if you still want to update you need to go Windows, either on a pc or through an emulator like VMware, Boot Camp, etc. Just don't try to use Parallels as the screwy USB implementation will cause it to fail.