Logic Pro 9 - reinstall and download basic content failing - "Logic was not able to complete the download"
I had the same issue and trying to download those basic files with no success on a laptop I reinstalled Sierra. Then I got the back up audio files (from time machine backup) and manually put them into place in the laptop. Here are the folders I moved manually...
library/audio/Apple Loops (1gb in size)
library/Application Support/Logic (60gb in size)
After putting the audio files on the Laptop with reinstalled Sierra, I opened Logic Pro 9 and it scanned and opened.
Hope this helps others.