While sites may offer "updated" or "free" (ingyene) downloads of these DMGs, they are no longer recommended for several reasons: macOS High Sierra | Specs, reviews and EoL info - InvGate
Then retry the installer.
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Select your target hard drive, click , format it as Mac OS Extended (Journaled) with a GUID Partition Map , and name it "Macintosh HD".
5.8 GB (compressed DMG) – expands to ~8 GB on USB.