I’ve been doing a fair bit of VMware patching recently so thought it would be useful to highlight the current and past versions of ESXi and how to check which version you are running. The latest version is 6.5 released 15th November, 2016. Since then there have been a few patches.
Below is a snapshot of the current versions as of 22 March 2017.
As with any new software test in a development environment first before upgrading to a new major version, let others lead the way on the bleeding edge and wait for Patch 1 to be released.