The much anticipated support for running vSphere on the latest generation of the Apple Apple Mac Pro 6,1 (black) is finally here with the release of ESXi 5.5 Update 2 Patch03. Due to unforeseen issues, it has taken a bit longer than expected to get the Apple Mac Pro certified, but VMware Engineering has been working hard to get all the bugs fixed and triaged with Apple and you can now run the latest release of vSphere on the Apple Mac Pro 4-core, 6-core, 8-core & 12-core configuration. I also would like to point out that when the next release of vSphere (.NEXT) is available, the Apple Mac Pro will also be certified and supported.
UPDATE (10/31) - Take a look at this blog post here for detailed instructions on installing ESXi 5.5 Update 2 Patch03 on the Mac Pro 6,1.
You can find the ESXi 5.5 Update 2 Patch03 (ESXi550-201410001) download here using Image Builder to author and ISO image which is equired to install ESXi on the new Mac Pro.
The VMware HCL has also been updated to reflect this new update:
Note: The VMware HCL currently lists 5.5 U2 as the supported release, but you will specifically need ESXi 5.5 Update 2 Patch03 for this new hardware support. I am hoping to get this further clarified on the HCL.
Here is a screenshot of the latest ESXi 5.5 Update 2 Patch03 running on an Apple Mac Pro 8-Core system courtesy from VMware Engineering: