If you are using ESXi 6.0, you can upgrade directly to ESXi 6.5. There is no order for this.
But you should remember that. Before upgrading, you must check the hardware compatibility of the physical server. If your physical server supports ESXi 6.5, you must update firmware before upgrading. It is very important that you keep the firmware versions up to date.
What is the physical server brand model? Let's check for hardware compatibility.--1 person found this helpful
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you can upgrade it to the ESXi 6.7 by ESXCLI or VUM without need to install these patches (and also easily downgrade it if there is a problem anyway) So if you need a special patch in ESXi 6.0, instead of that download and install same time published patch for ESXi version 6.5Please mark my comment as the Correct Answer if this solution resolved your problem