macOS Sierra restarting download instead of resuming macOS Sierra is a whopping 4GB+ download and on my capped bandwidth ISP connection I've wasted already 10GB just trying to download it. App Store always restarts download instead of resuming from how much it had already downloaded. I frequently get logged out (am guessing its because of heating issues) so the download is interrupted.

Am running OS X 10.10 on Macbook Air mid-2011 11" model. 

Any help to fix this?

Update Here's the output of syslog | grep -i "shutdown cause"

Oct  5 15:24:17 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  5 17:05:43 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  5 17:53:43 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  6 18:06:44 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  6 23:32:49 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  6 23:35:42 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  7 23:18:26 localhost kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  8 11:46:24 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3
Oct  8 11:52:36 leh kernel[0] &lt;Notice&gt;: Previous shutdown cause: 3


From googling the shutdown code, I saw that 3 stands for a dirty shutdown. How do I investigate which app is causing a dirty shutdown?
Try clearing the app store cache to see if that fixes the issue.
http://osxdaily.com/2016/10/08/mac-app-store-temp-cache-folder/