To hide or remove partitions from Clover, please note that your actions may be irreversible so have a clone of your drive before starting.
From Recovery HD: No password required
diskutil apfs deleteVolume VM
diskutil apfs deleteVolume Preboot
From Macintosh HD: Admin password required
sudo diskutil apfs deleteVolume VM
sudo diskutil apfs deleteVolume Preboot
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Stephan Pringle
Technology Support Specialist at Sipylus
About The Author: Stephan Pringle is an Information Technology Support Specialist. He covers hardware and software and provides tips for you to troubleshoot and repair issues on your own. In his spare time, he writes articles about the State of New York on his Hackintosh and HackBook and that has helped him to become the top contributor of the New York City section of Yahoo! Answers.