小心,Mac OS也有類似萬能密碼!

上次系統故障，差點要重裝系統。好在找到了一個方法同大家分享。

如果你有了一台蘋果電腦，但還不清楚如何設定Firmware password(類似BIOS密碼，預設是空的)，那你還是要瞭解一下。

開機按Alt不松,進RecoveryHD, 再進終端，輸入resetpassword，然後你就可以隨便改掉系統使用者的密碼。所以有空在啟用下吧！

 *當你忘記了系統使用者密碼，這個也能救你。

How to enable the Open Firmware Password

On any computer capable of firmware password protection (including Intel-based Macintosh computers), follow these steps:

1. For Mac OS X v10.1 to v10.3.9, download and install the Open Firmware Password application, which you can get here.

   For Mac OS X v10.4.x, you must use the updated version that can be copied from the software installation disc (located at /Applications/Utilities/ on the disc).

   For Mac OS X v10.5.x, start from the Leopard Install DVD and choose Firmware Password Utility from theUtilities menu, then skip to step 5.

2. Open the Open Firmware Password application.
3. Click the icon to authenticate. Enter an administrator username and password when prompted.
4. Click Change.
5. Click to select the checkbox for "Require password to change Open Firmware settings", as shown below.
   
6. Type your password in the Password and Verify fields.
7. Click OK. A confirmation appears.
8. Click lock icon to prevent further changes.
9. Choose Quit from the application menu.