why command R does not work on my mac mini

Are you using a wired or wireless keyboard? You may need to use a USB keyboard as a wireless keyboard may not go ready soon enough to register the boot keys.

nguyennapple Said:

"why command R does not work on my Mac mini why my mac min 2018 intel does not work with a couple comands: option (to choose boot disk) command + R to reinstall mac OS from built in."

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Is there a Boot Chime?

• Yes: If there is a boot chime, hold the down the corresponding keys during the boot chime
• No: If the is no boot chime, then hold down the corresponding keys just upon boot

I did an old one the other day. Restart the machine. I kept my fingers on those keys persistently till the Disk Utility app showed up & take it from there. Haven't had the need to do it on my new 2018 model, knock on wood.