Standard Assets Not Downloading

Hi there; I'm just starting out with Unity for Mac, following a Lynda.com course. The first thing it has you do is download Unity's Standard Assets package. So I do that, and as soon as it hits 100% downloaded, the download button resets. The assets are nowhere to be found, and cannot be called up in the project search bar nor imported when right-clicking in the project window... Can someone tell me what I'm doing wrong?
Thanks!

 

Just download them manually. Below are the latest releases available for the Standard Assets.

http://download.unity3d.com/downloa...aller/UnityStandardAssetsSetup-2018.1.0f2.exe - Windows
http://download.unity3d.com/downloa...AssetsInstaller/StandardAssets-2018.1.0f2.pkg - macOS