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Heads Up - Apple Mac Pro 6,1 fails to boot after upgrading to ESXi 6.7 Update 1

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We had a number of customers report that after upgrading their Apple Mac Pro 6,1 to the latest ESXi 6.7 Update 1 release, the system failed to boot and the following error was seen on the console:

Shutting down firmware services...
Mutiboot buffer is too small.
Unrecoverable error

A few customers made the observation that this was in result of a newer version of the Apple Firmware that was included in the Mac Pro 6,1 systems which seemed to have cause this problem. In addition, this also impacts brand new installations of ESXi 6.7 Update 1 on new Mac Pro 6,1 that includes a newer version of the Firmware. At this time, is it NOT recommended to upgrade to ESXi 6.7 Update 1 if you are running the Mac Pro 6,1. A request has already been made to the VMware HCL team to remove Mac Pro 6,1 for ESXi 6.7 Update 1 and hopefully should be reflected by later this evening.

UPDATE 04/11/19 - This issue has been resolved in vSphere 6.7 Update 2

Note: This issue can also affect the Apple Mac Mini, which is not an officially supported platform for ESXi.

In the mean time, VMware has published KB 59660 which provides a workaround that may help customers who have upgraded their Mac Pro 6,1 to ESXi 6.7 Update 1 to rollback to the previously installed version of ESXi. Please refer to the KB for more details and you can subscribe to the article for future updates regarding this issue.

Update on running ESXi on Intel NUC Hades Canyon (NUC8i7HNK & NUC8i7HVK)

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The Intel NUC is one of the most popular and affordable hardware platform for running vSphere and vSAN Home Labs. For customers that want a bit more computing power, Intel also has their Skull Canyon platform which was released back in 2016 and has also gained in popularity amongst VMware Home Labbers. To be clear, the none of the Intel NUC platforms are on VMware HCL and therefore are not officially supported.

Earlier this year, Intel released their second generation of their higher-end Intel NUCs dubbed Hades Canyon which comes in two flavors NUC8i7HNK and NUC8i7HVK, with the latter being the higher-end unit. Based on the previous generation of hardware, most customers assumed ESXi should just work and went out and purchased the lower-end "HNK" version just to find out that was not case. The ESXi Installer would boot up to a certain point and then stop with the following error:

“Shutting down firmware services…..

Using “simple offset” UEFI RTS mapping policy”

To add to the confusion, this issue was not observed with the higher-end NUC8i7HVK model which was also quite interesting. Over on the nucblog.net, they also confirmed ESXi runs fine on "HVK" model and the issue seems to be isolated to the lower-end "HNK" model.

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