mac系統忘記root密碼的解決辦法

由於長久不用Air了，所以忘記了之前的root密碼，導致很多命令都無法執行，於是找到了這個解決方案（經本人在Mac os x 10.6.8下測試成功！），故來跟大家分享下。

開機，並迅速按住 Command + S按鍵組合，進入命令列模式
輸入命令(有時可能要命令路徑不同，可參考螢幕上顯示的那兩行提示),檢查系統錯誤並修複
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/sbin/fsck -fy

輸入命令,使有許可權更改系統配置
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/sbin/mount -uw /
最後根據命令
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passwd root
來更改密碼就ok啦！
然後 敲入 reboot 命令，重啟機器就完工啦！

以下是原文：
Change an Admin Password in Mac OS X Single User Mode
This is a multistep process but it’s easy to follow:

First you need to enter Single User Mode. Reboot the Mac and hold down Command+S at boot to enter into the command line.
You’ll see a note where Mac OS X tells you that you need to run two commands in order to make filesystem changes, this is necessary so let’s handle that first
The first command checks the Mac OS X filesystem for errors and fixes them, it can take a few minutes to run:
fsck -fy

The next command mounts the root Mac OS X drive as writable, allowing you to make changes to the filesystem:
mount -uw /

After the filesystem is mounted, you can reset any users password using the following command:
passwd username

You’ll need to enter the new password twice to reset and confirm the changes