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how-to-protect-mac-computers-from-cold-boot-attacks/README.md

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+<!--
+Title: How to protect Mac computers from cold boot attacks
+Description: Learn how to protect Mac computers from cold boot attacks.
+Author: Sun Knudsen <https://github.com/sunknudsen>
+Contributors: Sun Knudsen <https://github.com/sunknudsen>
+Reviewers:
+Publication date: 2020-06-05T00:00:00.000Z
+-->
+
+# How to protect Mac computers from cold boot attacks
+
+[![How to protect Mac computers from cold boot attacks - YouTube](how-to-protect-mac-computers-from-cold-boot-attacks.png)](https://www.youtube.com/watch?v=d_M18sq0TIQ "How to protect Mac computers from cold boot attacks - YouTube")
+
+### Run the following `pmset` command using the Terminal.
+
+```shell
+sudo pmset -a destroyfvkeyonstandby 1 hibernatemode 25 standbydelaylow 0 standbydelayhigh 0
+```
+
+`destroyfvkeyonstandby 1` tells macOS to destroy password (override it with random data) when computer goes to standby mode.
+
+`hibernatemode 25` tells macOS to store the content of the RAM to the hard drive (which is encrypted using FileVault) and power off the RAM (which clears its data).
+
+`standbydelaylow 0` tells macOS to enable standby mode immediately when battery is low and computer is put to sleep.
+
+`standbydelayhigh 0` tells macOS to enable standby mode immediately when battery is high and computer is put to sleep.
+
+See `man pmset` for more information.
+
+---
+
+## Want things back the way they were before following this guide? No problem!
+
+### Run the following `pmset` command using the Terminal.
+
+```shell
+sudo pmset -a destroyfvkeyonstandby 0 hibernatemode 3 standbydelaylow 10800 standbydelayhigh 86400
+```