You can create upgrade baselines for ESXi hosts with ESXi 6.0 images that you import to the Update Manager repository.
You can use ESXi .iso images to upgrade ESXi 5.x hosts to ESXi 6.0.
To upgrade hosts, use the ESXi installer image distributed by VMware with the name format VMware-VMvisor-Installer-6.0.0-build_number.x86_64.iso or a custom image created by using vSphere ESXi Image Builder.
Prerequisites
Ensure that you have the Upload File privilege. For more information about managing users, groups, roles, and permissions, see vCenter Server and Host Management.
Connect the vSphere Client to a vCenter Server system with which Update Manager is registered, and on the Home page, click Update Manager under Solutions and Applications icon.
Procedure
Results
The ESXi image that you uploaded appears in the Imported ESXi Images pane. You can see more information about the software packages that are included in the ESXi image in the Software Packages pane.
If you also created a host upgrade baseline, the new baseline is displayed in the Baselines pane of the Baselines and Groups tab.
What to do next
To upgrade the hosts in your environment, you must create a host upgrade baseline if you have not already done so.