Press and hold the ⌥ Option key at start-up.
If you’re unsure which key to press, it is usually either Esc, Delete, F2, F12, or another function key. This key should be indicated on the screen at start-up or in your computer’s manual. Immediately at start-up, repeatedly press the designated key to open the Boot Device Menu.
Plug the Zorin OS USB Install Drive into the computer. Make sure it’s completely powered off, and not in sleep or hibernate mode. Switch off the computer you want to install Zorin OS onto. To install Zorin OS, you must boot your computer from the USB Install Drive. iso file to a USB flash drive with one of these alternatives: Instead of using balenaEtcher, try writing the Zorin OS.
