#11 - Sept. 12, 2014, 5:37 p.m.
Thanks for the logs everybody!
We've deployed a new backend change to the Battle.net app that should hopefully resolve this issue for you. In order to pickup the changes, please do the following.
Close your Battle.net App.Wait at least 15 seconds for background process to close.Re-launch your Battle.net App.If your app prompts you to restart to pickup an update, please do so.Once your app has re-launched, attempt to install the PTR again.Your download should no longer get stuck at ~9GB remaining.
If you're still getting stuck, click the Battlenet icon (Blue swirly thing) in the top left corner. Select Settings, and then click "About". Check to make sure that Battle.net Agent Version has updated to 1.15.1.3346. If it reads an older number, please restart your Battle.net client and re-launch it.