如果你所说的“游标速度”是指按住一个键时的重复率，那么看看这里: http://hints.macworld.com/article.php?story=20090823193018149

总之，打开终端窗口，输入以下命令:

defaults write NSGlobalDomain KeyRepeat -int 0

更多细节摘自文章:

Everybody knows that you can get a pretty fast keyboard repeat rate by changing a slider on the Keyboard tab of the Keyboard & Mouse System Preferences panel. But you can make it even faster! In Terminal, run this command: defaults write NSGlobalDomain KeyRepeat -int 0 Then log out and log in again. The fastest setting obtainable via System Preferences is 2 (lower numbers are faster), so you may also want to try a value of 1 if 0 seems too fast. You can always visit the Keyboard & Mouse System Preferences panel to undo your changes. You may find that a few applications don't handle extremely fast keyboard input very well, but most will do just fine with it.

注意:需要重启系统

系统首选项=>键盘=>增加键重复率