If you installed ESXI on your USB stick but you cannot boot from it, then probably the USB was formatted without MBR support.
In order to enable the Master Boot Record support for your USB stick you need to edit the boot options when the installer is loaded for the first time.
Shift+Owhen the installer is getting loaded. See below
Add a space and the parameter
formatwithmbrinto the command line text that at the bottom left of the screen.
Then it will look like this:
- That’s it enjoy your esxi 🙂