By default, a new install of OSX doesn't let iShowU see mouse and keyboard events. In that iShowU can create mouse and keyboard compositing animations, you need to "enable" this in system Preferences. Here's how you do it:
- Open up System Preferences, and click on Security and Privacy
- Choose the tab named Privacy, then select Accessibility from the list on the left hand side. Click on the Lock on the bottom left to make changes:
- Ensure that the checkbox to the left of iShowU Instant / iShowU Studio 2 is enabled.
Note that this doesn't mean iShowU is going to "control" your computer. The product is only "reading" key and mouse events as they happen.