The following suggestions that may help solve your problem:
- I see a security warning.
A warning does not affect your computer, so proceed to install by clicking the Download button.
- I was asked to re-install.
You'll get an error if you continue the installation. Close the browser window and try again. If you keep getting asked to re-install, uninstall once and retry.
- I want to uninstall it.
Select "Uninstall / Change a Program" from Control Panel to uninstall Unity Web Player.
- It crashes on my Mac.
Make sure you have installed the latest version of Unity Web Player.