CSGO: Download Incomplete Fix 2020 (Windows Machines)
Counter strike global offensive replays that download incomplete can be fixed using this method. Hope it helps.
Untested on MacOSX because you shouldn't be gaming on a Mac....
C:\Program files\Steam\steamapps\common\Counter-Strike Global Offensive\csgo\replays
is the default location, unless you have multiple hard drives or installed CSGO in another location