Increase FileVault security by destroying keys in standby mode

If you use full-disk encryption (FileVault) then your encryption key is stored by default in the EFI BIOS. This helps your Mac while awake from standby/sleep. This is ok for most security requirements, but not totally secure. You can configure your Mac that the key is destroyed when going in standby/sleep mode. The disadvantage is of course, that you have to enter your FileVault password when come back from standby/sleep mode.

How to fix it

macOS 10.11 – 14

  1. Open terminal.app
  2. Enter and press return: sudo pmset -a destroyfvkeyonstandby 1

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