= MacOS boot keys

Note that with a Windows keyboard:
  * <html><kbd>Command ⌘</kbd> is <kbd>Win ⊞</kbd></html>
  * <html><kbd>Option ⌥</kbd> is <kbd>Alt</kbd></html> 



| Safe mode                   | <kbd>Shift</kbd> after startup tone and until login screen              |
| Other boot disk (USB etc.)  | <kbd>Option ⌥</kbd> after startup tone and until startup choice appears |
| Boot Recovery partition     | <kbd>Command ⌘</kbd>+<kbd>R</key>                                       |
| Boot Recovery from Internet | <kbd>Option ⌥</kbd>+<kbd>Command ⌘</kbd>+<kbd>R</key>                   |
| Verbose                     | <kbd>Command ⌘</kbd>+<kbd>V</kbd>                                       |
| Apple Diagnostics           | <kbd>D</kbd> immediately, until test windows                            |
| Reset PRAM/NVRAM            | <kbd>Option ⌥</kbd>+<kbd>Command ⌘</kbd>+<kbd>P</kbd>+<kbd>R</kbd>, then release the keys after you hear the startup sound for a second time |
| Reset SMC                   | press and hold the <kbd>left Shift ⇧</kbd>)+<kbd>Control ⌃</kbd>+<kbd>Option ⌥</kbd> keys along with the Power (<kbd>⎋</kbd>) button, all at the same time, until the computer turns on. Now release the keys and then turn your Mac back on using the power button. |
| Single-user mode            | <kbd>Command ⌘</kbd>+<kbd>S</kbd> (only for High Sierra and before)     | 


(From https://support.apple.com/en-us/HT201255 and https://www.idownloadblog.com/2016/05/23/mac-startup-key-combinations/)

{{tag>public mac keyboard}}