第一步，在鼠标setting里面激活secondary click，并选择click on left side。这样就可以左右两个键互换了。接下来就是修改鼠标指针，参考如下步骤。

1. Download Mousecape.zip containing the 0.0.5 pre-release and install.
2. Install the helper tool from the menu bar by clicking Mousecape > Install Helper Tool.
3. From Mousecape preferences (Command-,) select "I am... left handed"
4. From the menu bar click Capes > Dump Cursors.
5. Click the cursor dump to highlight. Command-Enter to apply. Command-R to restore the default cursors.