High sierra headache

I'm trying to download high Sierra for my first hackintosh build, mostly because the Mac I have access to will only run up to Mac os high Sierra, as it's a 2011 27 Inch iMac unfortunately issues I'm encountering is that when I try to download the OS to create the installer, it downloads the 15mb file instead of the full 5.2gb file. Anybody know how I can get around this headache.

submitted by /u/Dr_G4ll1fr3y
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