The process to roll back and downgrade ESXi involves pressing the SHIFT+R key sequence when prompted while the ESXi host is booting. When you ... How ESXi version rollback works · Requirements for ESXi rollback
To revert to a previous version of ESXi: Reverting an ESXi host is only valid if the host was updated using these methods: VIB installation or removal ...
When you want to roll back, Reboot the host. When the Hypervisor progress bar starts loading, press Shift+R. Press Y to rollback, enter to reboot. Simple as ...