Mac has some known issues with their EFI implementation and SMBIOS IDs. As you stated, there are some workaround however System Center Configuration Manager does not support provisioning on Macs. The System Cetner Configuration Manager Team is
committed to working with the Microsoft Windows team to make Windows deployments easy. At this time I do not have an information on future support and roadmaps. Stay posted to the System Center site and team blog for annoucements of future release.
John Vintzel Microsoft Corporation| Program Manager | System Center Configuration Manager | twitter: jvintzel http://blogs.technet.com/b/inside_osd