Support for a Mac ?!... why ?!...
GeekSquad exists because Windows is full of bugs and non-senses... GeekSquad exists because most of the Windows users have problems with their configurations or setups... people who know about their PC will have no need of GeekSquad because they know how to install a HD and how to download its driver on the net. on a Mac, there is no driver -- so why ask for help if you install a HD on your Mac?!
a Mac do not need any driver that is not already provided in the OS
a Mac do not need specific configuration for each feature of the OS
a Mac do not have security levels across its OS, it is safe already
the reason why a Mac have a firewall is to prevent the PCs from its network to get visited
the reason why a Mac have an Anti-Virus is to prevent the PCs from its network to get infected
...other than that, you have nothing to setup when you install a Mac on your desktop... you can install most of the same softwares if there is no replacement within the OS (iWork replace MS Office -- and there is OpenOffice as a free solution)
You will have to take 2 or 3 hours to be aquinted to the new display and how the functions are set, but it's like changing a car from a manual to an automatic...