If the Flash Player install stops at 7%, you can install it using the following steps.
Download the DMG from Adobe's Website:
- Go to http://www.adobe.com/support/flashplayer/downloads.html
- Click on "Get the latest version."
- On the next page, click "Install now."
Show Package Contents
- Right-click on the icon to reveal a drop-down menu.
- Select "Show Package Contents" from the menu.
Open Install File
- Open the "Contents" folder.
- Open the "MacOS" folder.
- Right-click on the "Install Adobe Flash Player" file to reveal a drop-down menu.
- Select "Open" from the menu.