right zoom on Mavericks
quote from:
http://techblog.willshouse.com/2013/11/01/rightzoom-and-cinch-on-osx-10-9-mavericks/
Next, to fix RightZoom and Cinch on OSX 10.9 Mavericks you need to open System Preferences and go to Security and Privacy and then choose the Accessibility tab.
「設定」> 隱私 > 點選左側「輔助使用」> 勾選 right zoom
如果沒看到right zoom,將 right zoom 拖到「輔助使用」的右側。
若再不行,開啟 rightzoom 的選項,選: activate。
If you don’t see RightZoom.app listed, find it (probably in your Applications folder) and drag it to the list of apps. Make sure it has a check mark next to it.