I would join your club and order one today, if anybody of you could help me with definitely clearing up this TPM issue. Just run the command 'ioreg' on your terminal and post the output. (It doesn't matter if this output gets cut at line ends, since we only need the first left half.) Why this issue might be important to the future-proofness of the Mac Pro can be read here: In short: Without a TPM it'd be much easier for hackers to paravirtualize a Mac Pro on commodity PC hardware. So IF the Mac Pro really hasn't got a TPM (all other Intel Macs do), new OSX versions may one day be backwards compatible to almost all Macs but the first generation Mac Pro for copyright reasons. http://forums.macrumors.com/showthread.php?t=235108 (Just ignore the distractions from the impertinent guy posting "answers" to the issue, at the same time being unable to prove anything).