# How to protect Mac computers from cold boot attacks [](https://www.youtube.com/watch?v=d_M18sq0TIQ "How to protect Mac computers from cold boot attacks") ## Guide ### Run following command using “Terminal” app. ```shell sudo pmset -a destroyfvkeyonstandby 1 hibernatemode 25 standbydelaylow 0 standbydelayhigh 0 ``` 👍 `destroyfvkeyonstandby 1` tells macOS to destroy password when computer goes to standby mode. `hibernatemode 25` tells macOS to store the content of the RAM to the hard drive 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. Run `man pmset` using “Terminal” app 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 ``` 👍